Rome, as the capital of the Roman Empire, attracted thousands to the city and country from all over the empire, which included a great part of Europe, Western Asia and Northern Africa. Traders and merchants came to Italy from several different parts of the world. When the empire fell in 476 AD, Rome was no longer the epicentre of European politics and culture; on the other hand, it was the base of the papacy, which then governed the growing Christian religion, meaning that Rome remained one of Europe's major places of pilgrimage. Pilgrims, for centuries and still today, would come to the city, and that would have been the early equivalent of "tourism" or "religious tourism". The trade empires of Venice, Pisa and Genoa meant that several traders, businessmen and merchants from all over the world would also regularly come to Italy. In the 16th and early 17th centuries, with the height of the Renaissance, several students came to Italy to study Italian architecture.