in his later years, conrad founded the lauterberg monastery (later petersberg abbey) north of halle, to which he retired after he had officially renounced all secular rights in favour of his son otto ii on 30 november 1156. there he died the following year and was buried next to his wife, luitgard (lucarda; d. 1146), daughter of the swabian count adalbert of elchingen-ravenstein and his wife bertha of boll, possibly a daughter of duke frederick of swabia and the salian princess agnes of waiblingen.