Lothair II, Holy Roman Emperor

Lothair II of Supplinburg (1075–1137) was the only emperor of his house. Made Duke of Saxony in 1106, he was elected king at Mainz in 1125 after the childless Henry V. He fought the Staufer brothers and was beaten by the Bohemians at Chlumec in 1126.

Pope Innocent II crowned him emperor in 1133. His campaign of 1136–37 against Roger II of Sicily conquered Apulia, but he died on the march home at Breitenwang in 1137; his daughter Gertrude had married Henry the Proud.