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Adolf IV of Berg count of Berg from 1132 until 1160 and of Altena (died after 1161), son of Adolf III of Berg count of Berg and Hövel. He married (1st) Adelheid von Arnsberg, a daughter of Heinrich count von Rietberg; then (2nd) Irmgard (?) von Schwarzenberg, a daughter of Engelbert von Schwarzenberg.
He built the Schloss Altena, and built Altenberg Abbey (1133) where he enters in 1160.
He had issue from his first marriage:
Adolf V of Berg count of Berg (killed in Damascus 1148), who married Irmgard von Wasserburg, a daughter of Engelbert count von Wasserburg;
and from his second marriage:
Engelbert I of Berg count of Berg from 1160 until 1189 (born before 1150, died in Brandis an der Donau June 1189); married Margaret of Geldern (born 1157, died 1190?);
Arnold, Prince-Bishop of Osnabrück from 1173 until 1190 (died a crusader before Akkon, 15 December 1190).
At the beginning of the 12th century Adolf II of Berg donated the site of their old ancestral castle, Schloss Berg, to Cistercian monks from Burgundy. Adolf IV later built the Altenberg Abbey.
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