Fort Orange (Dutch: Fort Oranje) is a military fortification in Kralendijk, Bonaire. Originally built in 1639 as a nameless^[4] fort by the Dutch West India Company, it is the oldest structure on the island of Bonaire.^[5] The fort has never been used for its intended purpose.^[2][6] In 1816, it was rebuilt and named Fort Orange. The current lighthouse was built in 1932.^[3]

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Fort Orange
Fort Oranje
Kralendijk, Bonaire
Fort Orange Show map of Bonaire Fort Orange Show map of Caribbean
Coordinates	12.14883°N 68.27674°W / 12.14883; -68.27674
Type	Fortification
Area	0.308 hectares (0.76 acres)[1]
Site information
Owner	Bonaire
Open to the public	Yes
Site history
Built	1639 (original)[2] 1816 (current building)[3]
Materials	Stone
Battles/wars	None

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Fort Orange was built in 1639 after the island of Bonaire was conquered by the Netherlands. The fort has four metre high walls with four canons.^[5] The original fort was open on the land side. In 1800, Bonaire was ignored by the British. In 1804, Bonaire was taken by the British who had landed their troops out of sight, and captured the fort without a fight from the open land side.^[4] The canons which are currently in the fort date from the British period.^[6]

In 1816, Bonaire was returned to the Netherlands. The fort was reconstructed and named Fort Orange.^[3] The fort remained the headquarters of the Commander of Bonaire until 1837.^[6] The original wooden lighthouse was replaced by a stone lighthouse in 1932.^[3]

During the 20th century, the building has been used for multiple purposes: prison, fire department, police department, museum.^[3] Until 2011, it was in use by the Public Prosecution Service. Since 2011, it is used by the harbour authority and the waste management company.^[6] The ownership of the fort was transferred from the Dutch Government to the Island Territory of Bonaire in 1974.^[1]