Golden hat
Encyclopedia
Golden hats are a very specific and rare type of archaeological
Archaeology
Archaeology, or archeology , is the study of human society, primarily through the recovery and analysis of the material culture and environmental data that they have left behind, which includes artifacts, architecture, biofacts and cultural landscapes...

 artefact
Artifact (archaeology)
An artifact or artefact is "something made or given shape by man, such as a tool or a work of art, esp an object of archaeological interest"...

 from Bronze Age
Bronze Age Europe
The European Bronze Age is characterized by bronze artifacts and the use of bronze implements. The regional Bronze Age succeeds the Neolithic, it starts with the Aegean Bronze Age 3200 BC...

 Central Europe
Central Europe
Central Europe or alternatively Middle Europe is a region of the European continent lying between the variously defined areas of Eastern and Western Europe...

. So far, four such objects ("cone-shaped gold hats of the Schifferstadt type") are known. The objects are made of thin sheet gold and were attached externally to long conical and brimmed headdresses which were probably made of some organic material and served to stabilise the external gold leaf. The following Golden Hats are known at present:
  • Golden Hat of Schifferstadt
    Golden Hat of Schifferstadt
    The Golden Hat of Schifferstadt was discovered in a field near the town of Schifferstadt in Southwest Germany in 1835. It is a Bronze Age artefact made of thin sheet gold and served as the external decoration of a head-dress, probably of an organic material, with a brim and a chin-strap.- Cultural...

    , found in 1835 at Schifferstadt
    Schifferstadt
    Schifferstadt is a town in the Rhein-Pfalz-Kreis, in Rhineland-Palatinate, Germany.It is situated approx. 12 km southwest of Ludwigshafen and 6 km northwest of Speyer.- History :...

     near Speyer
    Speyer
    Speyer is a city of Rhineland-Palatinate, Germany with approximately 50,000 inhabitants. Located beside the river Rhine, Speyer is 25 km south of Ludwigshafen and Mannheim. Founded by the Romans, it is one of Germany's oldest cities...

    , circa 1400-1300 BC.
  • Avanton Gold Cone
    Avanton Gold Cone
    The Avanton Gold Cone or Avanton Cone is a late Bronze Age artefact, belonging to the group of Golden hats, only four of which are known so far....

    , incomplete, found at Avanton
    Avanton
    Avanton is a commune in the Vienne department in the Poitou-Charentes region in western France.A Bronze Age golden hat was found near Avanton in 1844, see Avanton Gold Cone. It is on display in the National Museum of Archeology in Saint-Germain-en-Laye....

     near Poitiers
    Poitiers
    Poitiers is a city on the Clain river in west central France. It is a commune and the capital of the Vienne department and of the Poitou-Charentes region. The centre is picturesque and its streets are interesting for predominant remains of historical architecture, especially from the Romanesque...

     in 1844, c. 1000-900 BC.
  • Golden Cone of Ezelsdorf-Buch
    Golden Cone of Ezelsdorf-Buch
    The Golden Cone of Ezelsdorf-Buch is a Late Bronze Age artefact discovered in 1953 between the villages of Ezelsdorf and Buch in Southern Germany. A tall , cone-shaped object made of thin sheet gold, it is seen as belonging to a group of artifacts referred to as Bronze Age Golden hats...

    , found near Ezelsdorf
    Burgthann
    Burgthann is a municipality in the district Nürnberger Land, in Bavaria, Germany. It is situated 20 km southeast of Nuremberg ....

     near Nuremberg
    Nuremberg
    Nuremberg[p] is a city in the German state of Bavaria, in the administrative region of Middle Franconia. Situated on the Pegnitz river and the Rhine–Main–Danube Canal, it is located about north of Munich and is Franconia's largest city. The population is 505,664...

     in 1953, circa 1000-900 BC; the tallest known specimen at c. 90 cm.
  • Berlin Gold Hat
    Berlin Gold Hat
    The Berlin Gold Hat or Berlin Golden Hat is a Late Bronze Age artefact made of thin gold leaf. It served as the external covering on a long conical brimmed headdress, probably of an organic material...

    , found probably in Swabia
    Swabia
    Swabia is a cultural, historic and linguistic region in southwestern Germany.-Geography:Like many cultural regions of Europe, Swabia's borders are not clearly defined...

     or Switzerland
    Switzerland
    Switzerland name of one of the Swiss cantons. ; ; ; or ), in its full name the Swiss Confederation , is a federal republic consisting of 26 cantons, with Bern as the seat of the federal authorities. The country is situated in Western Europe,Or Central Europe depending on the definition....

    , circa 1000-800 BC; acquired by the Museum für Vor- und Frühgeschichte
    Museum für Vor- und Frühgeschichte (Berlin)
    The Museum für Vor- und Frühgeschichte , part of the Berlin State Museums, is one of major archaeological museums of Germany, and among the largest supra-regional collections of prehistoric finds in Europe...

    , Berlin
    Berlin
    Berlin is the capital city of Germany and is one of the 16 states of Germany. With a population of 3.45 million people, Berlin is Germany's largest city. It is the second most populous city proper and the seventh most populous urban area in the European Union...

    , in 1996.

Cultural context

The hats are associated with the pre-Proto-Celtic Bronze Age
Bronze Age
The Bronze Age is a period characterized by the use of copper and its alloy bronze as the chief hard materials in the manufacture of some implements and weapons. Chronologically, it stands between the Stone Age and Iron Age...

 Urnfield culture
Urnfield culture
The Urnfield culture was a late Bronze Age culture of central Europe. The name comes from the custom of cremating the dead and placing their ashes in urns which were then buried in fields...

. Their close similarities in symbolism and techniques of manufacture are testimony to a coherent Bronze Age culture over a wide-ranging territory in eastern France and western and southwestern Germany. A comparable golden pectoral
Mold cape
The Mold Cape is a solid sheet-gold object dating from about 1900-1600 BC in the European Bronze Age. It was found at Mold in Flintshire, Wales, in 1833.The cape is thought to have formed part of a ceremonial dress, perhaps with religious connections...

 was found at Mold, Flintshire
Mold, Flintshire
Mold is a town in Flintshire, North Wales, on the River Alyn. It is the administrative seat of Flintshire County Council, and was also the county town of Clwyd from 1974 to 1996...

, in northern Wales, but this appears to be of somewhat earlier date.

The cone-shaped Golden Hats of Schifferstadt type are assumed to be connected with a number of comparable cap or crown-shaped gold leaf objects from Ireland
Ireland
Ireland is an island to the northwest of continental Europe. It is the third-largest island in Europe and the twentieth-largest island on Earth...

 (Comerford Crown
Comerford Crown
The Comerford Crown or Ikerrin Crown is the name of a lost archaeological relic probably dating from the Bronze Age that was in the possession of the noble Comerford Family from its discovery in 1692 in Ireland, later removal from Ireland, and possible loss by that family while living in exile in...

, discovered in 1692) and the Atlantic coast of Spain
Spain
Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

 (Gold leaf crowns of Axtroki and Rianxo). Only the Spanish specimens survive.

Archaeological context

Unfortunately, the archaeological contexts of the cones are not very clear (for the Berlin specimen, it is entirely unknown). At least two of the known examples (Berlin and Schifferstadt) appear to have been deliberately and carefully buried in antiquity.

Chronology

Although none can be dated precisely, their technology suggests that they were probably made between 1200 and 800 BC.

Function

It is assumed that the Golden Hats served as religious insignia
Insignia
Insignia or insigne pl -nia or -nias : a symbol or token of personal power, status or office, or of an official body of government or jurisdiction...

 for the deities or priests of a sun cult then widespread in Central Europe
Central Europe
Central Europe or alternatively Middle Europe is a region of the European continent lying between the variously defined areas of Eastern and Western Europe...

. Their use as head-gear is strongly supported by the fact that the three of four examples have a cap-like widening at the bottom of the cone, and that their openings are oval (not round), with diameters and shapes roughly equivalent to those of a human skull. The figural depiction of an object resembling a conical hat
Pointed hat
Pointed hats have been a distinctive item of headgear of a wide range of cultures throughout history. Though often suggesting an ancient Indo-European tradition, they were also traditionally worn by women of Lapland, the Japanese, the Mi'kmaq people of Atlantic Canada, and the Huastecs of Veracruz...

 on a stone slab of the King's Grave
The King's Grave
The King's Grave near Kivik in the southeastern portion of the Swedish province of Skåne is what remains of an unusually grand Nordic Bronze Age double burial c...

 at Kivik
Kivik
Kivik is a locality situated in Simrishamn Municipality, Skåne County, Sweden with 1,013 inhabitants in 2005. It is located in a part of Scania called Österlen....

, Southern Sweden
Sweden
Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....

, strongly supports their association with religion and cult, as does the fact that the known examples appear to have been deposited (buried) carefully.

Attempts to decipher the Golden Hats' ornamentation suggest that their cultic role is accompanied or complemented by a usability as complex calendrical devices. Whether they were really used for such purposes, or simply presented the underlying astronomical knowledge, remains unknown.

Calendars

The gold cones are covered in bands of ornaments along their whole length and extent. The ornaments - mostly disks and concentric circles, sometimes wheels - were punched using stamps, rolls or combs. The older examples (Avanton, Schifferstadt) show a more restricted range of ornaments than the later ones.

It appears to be the case that the ornaments on all known Golden Hats represent systematic sequences in terms of number and types of ornaments per band.

A detailed study of the Berlin example, which is fully preserved, revealed that the symbols probably represent a lunisolar calendar. The object would have permitted the determination of dates or periods in both lunar
Lunar calendar
A lunar calendar is a calendar that is based on cycles of the lunar phase. A common purely lunar calendar is the Islamic calendar or Hijri calendar. A feature of the Islamic calendar is that a year is always 12 months, so the months are not linked with the seasons and drift each solar year by 11 to...

 and solar calendar
Solar calendar
A solar calendar is a calendar whose dates indicate the position of the earth on its revolution around the sun .-Tropical solar calendars:...

s.

Since an exact knowledge of the solar year was of special interest for the determination of religiously important events such as the summer
Summer solstice
The summer solstice occurs exactly when the axial tilt of a planet's semi-axis in a given hemisphere is most inclined towards the star that it orbits. Earth's maximum axial tilt to our star, the Sun, during a solstice is 23° 26'. Though the summer solstice is an instant in time, the term is also...

 and winter solstice
Winter solstice
Winter solstice may refer to:* Winter solstice, astronomical event* Winter Solstice , former band* Winter Solstice: North , seasonal songs* Winter Solstice , 2005 American film...

s, the astronomical knowledge depicted on the Golden Hats was of high value to Bronze Age
Bronze Age
The Bronze Age is a period characterized by the use of copper and its alloy bronze as the chief hard materials in the manufacture of some implements and weapons. Chronologically, it stands between the Stone Age and Iron Age...

 society. Whether the hats themselves were indeed used for determining such dates, or whether they simply represented such knowledge, remains unknown.

The functions discovered so far would permit the counting of temporal units of up to 57 months. A simple multiplication of such values would also permit the calculation of longer periods, eg. metonic cycle
Metonic cycle
In astronomy and calendar studies, the Metonic cycle or Enneadecaeteris is a period of very close to 19 years which is remarkable for being very nearly a common multiple of the solar year and the synodic month...

s.

Each symbol, or each ring of a symbol, represents a single day. Apart from ornament bands incorporating differing numbers of rings there are special symbols and zones in intercalary areas, which would have had to be added to or subtracted from the periods in question.

The system of this mathematical function incorporated into the artistic ornamentation has not been fully deciphered so far, but a schematic understanding of the Berlin Golden Hat and the periods it delimits has been achieved.

In principle, starting with zone Zi, a sum is achieved by adding a relevant contiguous number of neighbouring sections: Zi .. Zi+n. To reach the equivalent lunar or solar value, from this initial sum must be subtracted the sum of symbols from the intercalary zone(s) within the area counted.

The illustration depicts the solar representation on the left and the lunar one on the right. The red or blue fields in zones 5, 7, 16 and 17 are intercalary zones.

The values in the individual fields are reached by multiplying the number of symbols per zone with the number of rings or circles incorporated in each predominant symbol. The special symbols in zone 5 are assigned the value of "38", as indicated by their number.
Example
Zone 12 is dominated by 20 repetitions of punched symbol No. 14, a circular disc symbol surrounded by 5 concentric circles.
Thus, the symbol has the value of 20 x 5 = 100.
The smaller ring symbols placed between the larger repetitions of No. 14 are considered as mere ornaments and thus not counted.


Through this system, the Hats can be used to calculate a lunisolar calendrical system, i.e. a direct reading in either lunar or solar dates, as well as the conversion between them.

The table can be used in the same way as the original Golden Hats. To determine the number of days in a specific time period (yellow fields), the values of the coloured fields above are added, reaching an intermediate sum. If any of the red intercalary zones are included, their sum has to be subtracted. This allows the calculation of 12, 24, 36, 48, 54 and 57 synodic months in the lunar system and of 12, 18, 24, 36, 48, 54 and 57 sun months (ie. twelfths of a tropical year).
Example
To determine a 54 month cycle in the lunar system, the numerical values of the green or blue zones 3 to 21 are added, reaching a sum of 1,739 days. From this, the values of the red intercalary fields 5, 16 and 17 are subtracted, The result is 1739-142=1597 days, or 54 synodic months of 29.5305 days each.


The overall discrepancy of 2 days to the astronomically accurate value is probably the result of a slight imprecision in the Bronze Age observation of synodic and solar month.

Manufacture

The Golden hats known so far are made from a gold alloy
Alloy
An alloy is a mixture or metallic solid solution composed of two or more elements. Complete solid solution alloys give single solid phase microstructure, while partial solutions give two or more phases that may or may not be homogeneous in distribution, depending on thermal history...

 containing 85-90% Au
Gold
Gold is a chemical element with the symbol Au and an atomic number of 79. Gold is a dense, soft, shiny, malleable and ductile metal. Pure gold has a bright yellow color and luster traditionally considered attractive, which it maintains without oxidizing in air or water. Chemically, gold is a...

, circa 10% Ag
Silver
Silver is a metallic chemical element with the chemical symbol Ag and atomic number 47. A soft, white, lustrous transition metal, it has the highest electrical conductivity of any element and the highest thermal conductivity of any metal...

 and traces of Cu
Copper
Copper is a chemical element with the symbol Cu and atomic number 29. It is a ductile metal with very high thermal and electrical conductivity. Pure copper is soft and malleable; an exposed surface has a reddish-orange tarnish...

 and Sn
Tin
Tin is a chemical element with the symbol Sn and atomic number 50. It is a main group metal in group 14 of the periodic table. Tin shows chemical similarity to both neighboring group 14 elements, germanium and lead and has two possible oxidation states, +2 and the slightly more stable +4...

 (< 1% each). They are made of seamless single pieces of gold leaf, hammered to a thinness between 0.25 millimetre (0.00984251968503937 in) (Schifferstadt) and 0.06 millimetre (0.00236220472440945 in) (Berlin). Thus, the cones are surprisingly light considering their size. The Ezelsdorf example, measuring 89 centimetres (35 in) in height, weighs only 280 grams (9.9 oz).

Because of the tribological
Tribology
Tribology is the science and engineering of interacting surfaces in relative motion. It includes the study and application of the principles of friction, lubrication and wear...

 characteristics of the material, it tends to harden with increasing deformation (see ductility
Ductility
In materials science, ductility is a solid material's ability to deform under tensile stress; this is often characterized by the material's ability to be stretched into a wire. Malleability, a similar property, is a material's ability to deform under compressive stress; this is often characterized...

), increasing its potential to crack. To avoid cracking, an extremely even deformation was necessary. Additionally, the material had to be softened by repeatedly heating it to a temperature of at least 750 °C (1,382 °F).

Since gold alloy has a relatively low melting point
Melting point
The melting point of a solid is the temperature at which it changes state from solid to liquid. At the melting point the solid and liquid phase exist in equilibrium. The melting point of a substance depends on pressure and is usually specified at standard atmospheric pressure...

 of circa 960 °C (1,760 °F), a very careful temperature control
Temperature control
Temperature control is a process in which change of temperature of a space is measured or otherwise detected, and the passage of heat energy into or out of the space is adjusted to achieve a desired average temperature....

 and an isothermal heating process
Isothermal process
An isothermal process is a change of a system, in which the temperature remains constant: ΔT = 0. This typically occurs when a system is in contact with an outside thermal reservoir , and the change occurs slowly enough to allow the system to continually adjust to the temperature of the reservoir...

 were required, so as to avoid melting any of the surface. For this, the Bronze Age artisans used a charcoal fire or oven similar to those used for pottery
Pottery
Pottery is the material from which the potteryware is made, of which major types include earthenware, stoneware and porcelain. The place where such wares are made is also called a pottery . Pottery also refers to the art or craft of the potter or the manufacture of pottery...

. The temperature could only be controlled through the addition of oxygen
Oxygen
Oxygen is the element with atomic number 8 and represented by the symbol O. Its name derives from the Greek roots ὀξύς and -γενής , because at the time of naming, it was mistakenly thought that all acids required oxygen in their composition...

, using a bellows
Bellows
A bellows is a device for delivering pressurized air in a controlled quantity to a controlled location.Basically, a bellows is a deformable container which has an outlet nozzle. When the volume of the bellows is decreased, the air escapes through the outlet...

.

Considering the tribologic conditions and the technical means available at the time, the production even of an undecorated Golden hat would represent an immense technical achievement.

In the course of their further manufacture, the Golden hats were embellished with rows of radial ornamental bands, chased into the metal. To make this possible, they were probably filled with a putty
Putty
Putty is a generic term for a plastic material similar in texture to clay or dough typically used in domestic construction and repair as a sealant or filler. Painter's Putty is typically a linseed oil based product used for filling holes, minor cracks and defacements in wood only...

 or pitch
Pitch (resin)
Pitch is the name for any of a number of viscoelastic, solid polymers. Pitch can be made from petroleum products or plants. Petroleum-derived pitch is also called bitumen. Pitch produced from plants is also known as resin. Products made from plant resin are also known as rosin.Pitch was...

 based on tree resin
Resin
Resin in the most specific use of the term is a hydrocarbon secretion of many plants, particularly coniferous trees. Resins are valued for their chemical properties and associated uses, such as the production of varnishes, adhesives, and food glazing agents; as an important source of raw materials...

 and wax
Wax
thumb|right|[[Cetyl palmitate]], a typical wax ester.Wax refers to a class of chemical compounds that are plastic near ambient temperatures. Characteristically, they melt above 45 °C to give a low viscosity liquid. Waxes are insoluble in water but soluble in organic, nonpolar solvents...

 - in the Schifferstadt specimen, traces of this have survived. The thin gold leaf was structured by chasing: stamp-like tools or moulds depicting the individual symbols were repeatedly pressed into (or rolled along) the exterior of the gold. Combs were also used.

Exhibitions

The gold hats were first brought together for comparison and set in the broader context of the culture of Bronze Age Europe in a 1999 exhibition in Bonn
Bonn
Bonn is the 19th largest city in Germany. Located in the Cologne/Bonn Region, about 25 kilometres south of Cologne on the river Rhine in the State of North Rhine-Westphalia, it was the capital of West Germany from 1949 to 1990 and the official seat of government of united Germany from 1990 to 1999....

, Gods and heroes of the Bronze Age: Europe in the time of Odysseus. Normally they reside in separate museums, at Berlin (Museum für Vor- und Frühgeschichte
Museum für Vor- und Frühgeschichte (Berlin)
The Museum für Vor- und Frühgeschichte , part of the Berlin State Museums, is one of major archaeological museums of Germany, and among the largest supra-regional collections of prehistoric finds in Europe...

), Speyer (Historisches Museum der Pfalz, the Schifferstadt specimen), Nuremberg (Germanisches Nationalmuseum
Germanisches Nationalmuseum
The Germanisches Nationalmuseum is a museum in Nuremberg, Germany. Founded in 1852, houses a large collection of items relating to German culture and art extending from prehistoric times through to the present day...

, the Ezelsdorf one), and Saint-Germain-en-Laye
Saint-Germain-en-Laye
Saint-Germain-en-Laye is a commune in the Yvelines department in the Île-de-France in north-central France. It is located in the western suburbs of Paris from the centre.Inhabitants are called Saint-Germanois...

 (Musée d'Archéologie Nationale).

Related objects

The golden hats, or more specifically, the sun cult they appear to have expressed or served, are also often seen as connected with a number of other prominent works of Bronze Age or early Iron Age
Iron Age
The Iron Age is the archaeological period generally occurring after the Bronze Age, marked by the prevalent use of iron. The early period of the age is characterized by the widespread use of iron or steel. The adoption of such material coincided with other changes in society, including differing...

 art. These include the Nebra skydisk
Nebra skydisk
The Nebra Sky Disk is a bronze disk of around 30 cm diameter, with a blue-green patina and inlaid with gold symbols. These are interpreted generally as a sun or full moon, a lunar crescent, and stars . Two golden arcs along the sides, marking the angle between the solstices, were added later...

, which predates them but implies similarly advanced astronomic knowledge, the Mold cape
Mold cape
The Mold Cape is a solid sheet-gold object dating from about 1900-1600 BC in the European Bronze Age. It was found at Mold in Flintshire, Wales, in 1833.The cape is thought to have formed part of a ceremonial dress, perhaps with religious connections...

, which is of a similar standard of workmanship and is likely to have adorned a priest or otherwise special individual, the Trundholm Sun Chariot
Trundholm sun chariot
The Trundholm sun chariot , is a late Nordic Bronze Age artifact discovered in Denmark. It is a representatino of the sun chariot, a bronze statue of a horse and a large bronze disk, which are placed on a device with spoked wheels....

, a clear representation of sun-related beliefs, a variety of Scandinavian petroglyph
Petroglyph
Petroglyphs are pictogram and logogram images created by removing part of a rock surface by incising, picking, carving, and abrading. Outside North America, scholars often use terms such as "carving", "engraving", or other descriptions of the technique to refer to such images...

s, and assemblages like the Bernstorf Gold Hoard, with golden elements originally attached to clothing, or the Eberswalde Treasure, which features similar decorative motifs to those on the hats. The widespread distribution of the Sun cross
Sun cross
The sun cross, also known as the wheel cross, Odin's cross, or Woden's cross, a cross inside a circle, is a common symbol in artifacts of the Americas and Prehistoric Europe, particularly during the Neolithic to Bronze Age periods.-Stone Age:...

 and similar motifs in Bronze Age central and northern Europe may also be connected.

See also

  • Nebra sky disk, another Central European metal object from the Bronze Age expressing advanced knowledge of astronomy, between 1700 and 2100 BC.
  • Pointed hat
    Pointed hat
    Pointed hats have been a distinctive item of headgear of a wide range of cultures throughout history. Though often suggesting an ancient Indo-European tradition, they were also traditionally worn by women of Lapland, the Japanese, the Mi'kmaq people of Atlantic Canada, and the Huastecs of Veracruz...

  • Trundholm sun chariot
    Trundholm sun chariot
    The Trundholm sun chariot , is a late Nordic Bronze Age artifact discovered in Denmark. It is a representatino of the sun chariot, a bronze statue of a horse and a large bronze disk, which are placed on a device with spoked wheels....

  • Tumulus culture
    Tumulus culture
    The Tumulus culture dominated Central Europe during the Middle Bronze Age .It was the descendant of the Unetice culture. Its heartland the area previously occupied by the Unetice culture besides Bavaria and Württemberg...

  • Urnfield culture
    Urnfield culture
    The Urnfield culture was a late Bronze Age culture of central Europe. The name comes from the custom of cremating the dead and placing their ashes in urns which were then buried in fields...

  • List of hats and headgear

External links

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