Due to the presence of the Spanish and Portuguese Inquisition in the Iberian American territories, initially, converso immigration was barred throughout much of Ibero-America. Because of this, very few converso immigrants in Iberian American colonies ever reverted to Judaism. Of those conversos in the New World who did return to Judaism, it was principally those who had come via an initial respite of refuge in the Netherlands and/or who were settling the New World Dutch colonies such as Curaçao and the area then known as New Holland (also called Dutch Brazil). Dutch Brazil was the northern portion of the colony of Brazil ruled by the Dutch for under a quarter of a century before it also fell to the Portuguese who ruled the remainder of Brazil. Jews who had only recently reverted in Dutch Brazil then again had to flee to other Dutch-ruled colonies in the Americas, including joining brethren in Curaçao, but also migrating to New Amsterdam, in what is today New York.