The story of Tallinn is a tale of three cities: an ancient citadel, the old town, and the modern city. Capital of the Estonian Republic, the coastal settlement is almost opposite Helsinki on the Gulf of Finland. The citadel, known as Toompea Castle, sits on a craggy hill peering down on a fascinating amalgam of medieval rooftops and winding cobbled streets, punctuated here and there by graceful spires and turreted towers. Around this ancient core, building continues constantly, and Tallinn today is the major industrial centre in Estonia. Tallinn is now the home of no less than six theatres and is famous throughout the Baltic for its song festivals, where massed choirs sing to packed audiences in a huge open-air stadium. Sailing, too, is an important recreation. Tallinn-made yachts are renowned, and in 1980 the city hosted the yachting events for Moscow's Olympics. Tallinn enjoys a mild climate, with summer 'white nights', when sunset blends into sunrise, rivalling those of St Petersburg.