972 was a year in the 10th century. Events By Place Europe Otto II marries Theophanu, Byzantine princess. Battle of Cedynia: Polish duke Mieszko I defeats the Germans. Boleslaus II the Pious succeeds Boleslav I in Bohemia. The monastery at the site of Peterborough Cathedral is rebuilt. Emperor John Tzimisces makes eastern Bulgaria a Byzantine dependency. A battle between Estonian and Icelandic Vikings in Saaremaa is described in Njál's saga. Yaropolk of Kiev succeeds Sviatoslav I… (More on 972)