The lands of Ryazan, situated on the border of forest and steppe, suffered numerous invasions from the south as well as from the north, carried out by a variety of military forces including Cumans, but particularly the Principality was in a conflict with Vladimir-Suzdal. By the end of the 12th century, the capital of Duchy was burnt several times by the armies of Suzdal. Ryazan was the first Russian city to be sacked by the Mongol horde of Batu Khan. On December 21, 1237, it was thoroughly devastated and never fully recovered. As result of the sack, the seat of the principality was moved about to the town of Pereslavl-Ryazansky, which subsequently took the name of the destroyed capital. The site of the old capital now carries the name of Staraya Ryazan ("Old Ryazan"), close to Spassk-Ryazansky.