About 838,000 people were living in Amsterdam in 2016. The city hosts two universities (the University of Amsterdam and the Free University Amsterdam) and an international airport "Schiphol Airport". About 2.2 million people live in the metropolitan area. The city of Amsterdam is the world's most multi-cultural city. It has people living there from 175 different countries. Like other big cities in the Netherlands and elsewhere in the world, Amsterdam is unfortunately subjected to many criminal activities.