The ancestors of modern Russians are the Slavic tribes, whose original home is thought by some scholars to have been the wooded areas of the Pinsk Marshes, one of the largest wetlands in Europe. The East Slavs gradually settled Western Russia in two waves: one moving from Kiev towards present-day Suzdal and Murom and another from Polotsk towards Novgorod and Rostov. From the 7th century onwards, the East Slavs constituted the bulk of the population in western Russia, and slowly but peacefully assimilated the native Finnic peoples, including the Merya, the Muromians, and the Meshchera.