Santísima Trinidad (meaning "Holy Trinity") was a bay on the northeast coast of Taiwan at Keelung, where in 1626 the Spanish established a settlement and built Fort San Salvador. They occupied the site until 1642 when they were driven out by the Dutch. The Dutch re-shaped the Spanish fort, reduced its size and renamed it Fort Noort-Holland. In 1663, the Dutch returned to Keelung, retook the fort, strengthened and enlarged it and kept it until 1668, when they voluntarily gave it up, as the trade in Keelung was not what they expected it to be.