As the northernmost and coldest megacity in the world, and with a history that dates over eight centuries, Moscow is governed as a federal city (since 1993) that serves as the political, economic, cultural, and scientific centre of Russia and Eastern Europe. As an alpha world city, Moscow has one of the world's largest urban economies. The city is one of the fastest-growing tourist destinations in the world, and is one of Europe's most visited cities. Moscow is home to the fourth-highest number of billionaires of any city in the world, and has the highest number of billionaires of any city in Europe. The Moscow International Business Center is one of the largest financial centres in Europe and the world, and features some of Europe's tallest skyscrapers. Muscovites enjoy public digital services more than anywhere else in Europe, and the best e-government services in the world. Moscow was the host city of the 1980 Summer Olympics, and one of the host cities of the 2018 FIFA World Cup.