Izborsk is a rural village in Pechorsky District of Pskov Oblast, Russia. It contains one of the most ancient and impressive fortresses of Western Russia. The village lies 30 kilometers (19 mi) to the west of Pskov and just to the east of the Russian-Estonian border.According to the Treaty of Tartu, the Russian-Estonian state boundary went eastwards of Izborsk and thus the town was part of Estonia from 1920 to early 1945 when, both Russia and Estonia being part of Soviet Union, the Russian SFSR/Estonian SSR boundary was moved westwards and thus Izborsk became part of the Russian SFSR.