HMS Essex was a 48-gun third rate  frigate built for the navy of the Commonwealth of England

Commonwealth of England

The Commonwealth of England was the republic which ruled first England, and then Ireland and Scotland from 1649 to 1660. Between 1653–1659 it was known as the Commonwealth of England, Scotland and Ireland...

 by Phineas Pett II at Deptford

Deptford

Deptford is a district of south London, England, located on the south bank of the River Thames. It is named after a ford of the River Ravensbourne, and from the mid 16th century to the late 19th was home to Deptford Dockyard, the first of the Royal Navy Dockyards.Deptford and the docks are...

, and launched in 1653.

Between 1 June and 4 June (by the Julian Calendar

Julian calendar

The Julian calendar began in 45 BC as a reform of the Roman calendar by Julius Caesar. It was chosen after consultation with the astronomer Sosigenes of Alexandria and was probably designed to approximate the tropical year .The Julian calendar has a regular year of 365 days divided into 12 months...

) 1666 Essex fought at the Four Days Battle

Four Days Battle

The Four Days Battle was a naval battle of the Second Anglo–Dutch War. Fought from 1 June to 4 June 1666 in the Julian or Old Style calendar then used in England off the Flemish and English coast, it remains one of the longest naval engagements in history.In June 1665 the English had soundly...

. On the final day of the engagement, she was captured by the Dutch

Dutch Republic

The Dutch Republic — officially known as the Republic of the Seven United Netherlands , the Republic of the United Netherlands, or the Republic of the Seven United Provinces — was a republic in Europe existing from 1581 to 1795, preceding the Batavian Republic and ultimately...

. By the time of the battle, Essex's armament had been increased to 60 guns.