Amsterdam has historically been the center of the Dutch Jewish community, and has had a continuing Jewish community for the last 370 years. Amsterdam is also known under the name "Mokum", given to the city by its Jewish inhabitants ("Mokum" is Yiddish for "town", derived from the Hebrew "makom", which literally means "place"). Although the Holocaust deeply affected the Jewish community, killing some 80% of the some 80,000 Jews at time present in Amsterdam, since then the community has managed to rebuild a vibrant and living Jewish life for its approximately 15,000 present members. The former Mayor of Amsterdam, Job Cohen, is Jewish. Cohen was runner-up for the award of World Mayor in 2006.
Permanent Jewish life in Amsterdam began with the arrival of pockets of Marrano and Sephardic Jews at the end of the 16th, and beginning of the 17th century; their first Chief Rabbi was Rabbi Uri Levi. Many Sephardi (so-called Spanish Jews) had been expelled from Spain in 1492 after the fall of Muslim Granada. Those that moved to Portugal were forced to leave in 1497, where they were given the choice between conversion to Catholicism or death penalty on the grounds of heresy.
From 1497, others remained in the Iberian peninsula, practising Judaism secretly in their homes. The newly independent Dutch provinces provided an ideal opportunity for these crypto-Jews to re-establish themselves and practise their religion openly, and they migrated, most notably to Amsterdam. Collectively, they brought economic growth and influence to the city as they established an international trading hub in Amsterdam during the 17th century, the so-called Dutch Golden Age.