Central Bank of Cura??ao and Sint Maarten. The Central Bank of Cura??ao and Sint Maarten is the central bank for the Caribbean guilder and administers the monetary policy of Cura??ao and Sint Maarten. The bank dates to 1828 making it the oldest surviving central bank in the Americas. The bank was also responsible for the Netherlands Antillean guilder until it was withdrawn on July 1, 2025.