Duke married Matilda Of ENGLAND on 01 Feb 1168 in St Peter, Domkirche, Minden, Germany. Matilda (daughter of King of England Henry ll CURMANTLE and Princess Eleanor DE AQUITAINE) was born in 1156 in London, Middlesex, England; died on 28 Jun 1189 in Brunswick, Germany; was buried in St Blasius, Braunschweig, Braunschweig, Germany. [Group Sheet] [Family Chart]