 Those tribes migrated to the West in 5th century and then came Slavs.The first Slavic people (Czech tribes in Bohemia and Moravians in Moravia) arrived in the 6th century.According to historian Dušan Třeštík, they advanced through the Moravian Gate ("Moravská brána") valley and in the year 530 moved into Eastern Bohemia, along the rivers Labe (Elbe) and Vltava (Moldau) further into Central Bohemia.