Vologda Oblast (Vologodskaya oblast, vəlɐˈɡotskəjə ˈobləsjtj; Vologdan agj) is a federal subject of Russia (an oblast). Its administrative center is Vologda. The oblast has a population of 1,202,444 (2010 Census). The largest city is Cherepovets, the home of the Severstal metallurgical plant, the largest industrial enterprise in the oblast. Vologda Oblast is home to many historic monuments, such as the Kirillo-Belozersky Monastery, Ferapontov Monastery (a World Heritage Site) with the frescoes of Dionisius, the two medieval towns of Velikiy Ustyug and Belozersk, and the baroque churches of Totma and Ustyuzhna. Large reserves of wood and fresh water are the main natural resources. The area of Vologda Oblast was settled by Finnic peoples in prehistory, and most of the toponyms in the region are in fact Finnic. Vepsians, who still live in the west of the oblast, are the descendants of that population. Subsequently, the area was colonized by the Russians. Belozersk was mentioned in chronicles in 862 as one of the oldest towns in Russia. Much of the area was controlled by the Novgorod Republic, in particular, Totma was founded in 1152. Veliky Ustyug and the west of the current territory of the Oblast, with Belozersk and Ustyuzhna, belonged to the Vladimir-Suzdal Principality and were constantly threatened by Novgorod. Not later than in the 13th century the Novgorod merchants already reached the White Sea. They reached the area by using the waterways. The main waterway to the White Sea was the Northern Dvina, and Novgorod merchants used the Volga and its tributary, the Sheksna, along the Slavyanka River into Lake Nikolskoye, then the boats were taken by land to Lake Blagoveshchenskoye, from there downstream along the Porozovitsa River into Lake Kubenskoye and further to the Sukhona and the Northern Dvina. In the 13th century, minor principalities started to proliferate. First, the Principality of Beloozero separated from Rostov, its northern and northeastern parts in the 15th century became quasi-independent, forming smaller feudal states like the Principality of Zaozerye or the Principality of Kubena.