The hundred year sports tradition at the University of Zagreb, established in 1669, provided a driving force to the "University Games 1987". Today, the University is made up of thirty three four-year colleges, two year colleges and academies with 47 thousand students, 3500 instructors and two thousand staff members. In the last fifty years, 150 thousand undergraduates and nearly four thousand doctoral candidates have completed their studies at the University of Zagreb. The University of Zagreb was founded by a charter from King Leopold I on September 23, 1669. The Zagreb Academy of Philosophy attained all the rights and privileges enjoyed by universities established, according to the charter, "within the borders of the German empire and neighbouring regions such as the universities in Cologne, Vienna, Mainz, Ingolstadt, Prague, Olmouc, Graz, Trnava and Kosice." But not one of the royal privileges was valid until passed by the Croatian Sabor which convened on November 3, 1671 and approved the royal charter. The oldest colleges in Zagreb were the College of Philosophy and the College of Theology founded in 1669, while the Law School was established in 1776. This makes the University of Zagreb older than the renowned universities of Yale, Stratford, Lomonosov, Columbia, Princeton, Petrograd, Montreal, Tokyo, Athens, Istanbul, which were all founded a full hundred years later.