Tens of thousands of Orthodox worshippers marched through Kiev to mark the anniversary of the Baptism of Kievan Rus, on Friday. The procession of the Ukrainian Orthodox Church of the Moscow Patriarchate included clerics and worshippers from around the world who gathered to celebrate the 1030th anniversary of Vladimir the Great's (980-1015) introduction of Christianity with his own baptism in 988... Еще. People marched through the centre of the capital to Kiev Pechersk Lavra, a historic Orthodox Christian monastery. Kievan Rus was a federation of East Slavic tribes in Europe from the late 9th to the mid-13th century under the reign of the Rurik dynasty. At its greatest extent it stretched from the Baltic Sea in the north to the Black Sea in the south.