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.
Castle of Altena
He built the Schloss Altena, and built Altenberg Abbey (1133) where he enters in 1160.
He has 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?);