Budapest was founded historically with the creation of the Roman outpost of Aquincum in 89 A.D. The Magyars, the forefathers of the Hungarians of today, who founded the Kingdom of Hungary a century later, occupied it in 898. After being destroyed by the hand of the Tartars, Pest was reconstructed in 1241, though Buda, where the Royal Palace stood, had been the capital of Hungary since 1247. In 1526 Pest fell to the invading Turks and Buda followed it 15 years later. The Turkish government maintained Buda as its headquarters, but Pest fell into ruins. The three cities of Buda, Óbuda and Pest were given a single administration in 1849, though this was later revoked by the Hapsburg authorities and then made even more effective with the Austro-Hungarian "Compromise" of 1867 ruled by the independent Hungarian government in power. The city was seriously damaged when it was besieged by the Russians, but reconstructed after the war. Budapest was one of the main centres of the Hungarian revolt, when the population defied and clashed with the Soviet troops, only to end up with the defeat of the rebels. Budapest resumed its economic and cultural links with Western Europe after the fall of the Communist regime in 1989. There has been a considerable fall in the birth rate in Budapest since the 1990's, caused by emigration and a natural decrease in the population.