Philippe Danfrie
Encyclopedia
Philippe Danfrie the elder (about 1532 in Cornouaille
Cornouaille
Cornouaille is a historic region in Brittany, in northwest France. The name is identical to the French name for the Duchy of Cornwall, since the area was settled by migrant princes from Cornwall...

 in Brittany
Brittany
Brittany is a cultural and administrative region in the north-west of France. Previously a kingdom and then a duchy, Brittany was united to the Kingdom of France in 1532 as a province. Brittany has also been referred to as Less, Lesser or Little Britain...

 - 1606 in Paris
Paris
Paris is the capital and largest city in France, situated on the river Seine, in northern France, at the heart of the Île-de-France region...

), was a designer and maker of mathematical instrument
Mathematical instrument
A mathematical instrument is a tool or device used in the study or practice of mathematics.Most instruments are used within the field of geometry, including the ruler, dividers, protractor, set square, compass, ellipsograph and opisometer...

s in metal and paper, as well as a type-cutter, engraver, minter of coins and medals, publisher and author. Much is known about Danfrie's life and activities. He is probably best known as designer of the surveying instrument known as the graphometer
Graphometer
The graphometer or semicircle is a surveying instrument used for angle measurements. It consists of a semicircular limb divided into 180 degrees and sometimes subdivided into minutes. The limb is subtended by the diameter with two sights at its ends. In the middle of the diameter a "box and needle"...

.

Danfrie went to Paris in the 1550s and set up as an engraver of letter punches. He produced a number of books in partnership with Richard Breton in 1558–60 and later with Pierre Haman and Jean Le Royer. He also made mathematical instruments, globes and astrolabes and dies for marking bookbindings. In 1571 he cut his first dies for jeton
Jeton
Jetons were token or coin-like medals produced across Europe from the 13th through the 17th centuries. They were produced as counters for use in calculation on a lined board similar to an abacus. They also found use as a money substitute in games, similar to modern casino chips or poker chips...

s. As Engraver-General of the French coinage from 1582, he provided the puncheons from which the dies used in every mint in France were taken. He also produced a number of medals (e.g. London, BM) commemorating the events of the first fifteen years of Henry IV’s reign.

Engraver and superintendent of the Paris Mint, Philippe Danfrie was also an engineer and inventor of scientific instruments. Active in the second half of the sixteenth century, he built globes, astrolabes, and clocks. He invented a typeface that he used in his published writings. These include: Declaration de l'usage du Graphometre..., printed in Paris in 1597 together with Traicte de l'usage du Trigometre, avec le quel on peut facilement mesurer sans subiection d'Arithmetique.

His son Philippe Danfrie the younger (b. ?Paris, c. 1572; d. Paris, 1604) was appointed Controller-General of effigies in 1591. On his appointment it was claimed that he had demonstrated great skill in modelling portraits in wax and engraving puncheons. His most famous and only signed medal (e.g. London, BM) is cast rather than struck and celebrates the victory of Henry IV
Henry IV of France
Henry IV , Henri-Quatre, was King of France from 1589 to 1610 and King of Navarre from 1572 to 1610. He was the first monarch of the Bourbon branch of the Capetian dynasty in France....

 over the Duke of Savoy
House of Savoy
The House of Savoy was formed in the early 11th century in the historical Savoy region. Through gradual expansion, it grew from ruling a small county in that region to eventually rule the Kingdom of Italy from 1861 until the end of World War II, king of Croatia and King of Armenia...

in 1600.
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