Theuerkauff (op.cit.) relates the central ivory in this house-altar to a group of twenty two ivories tentatively described as South German-Austrian (Augsburg), early 18th Century. Several of the ivories are contained within house-altars by Johann Andreas Thelot. Theuerkauff mentions that Thelot is recorded as being involved with the workshop of the Steudner family of ivory carvers, who were active in Augsburg in the late 17th and 18th Century (cf. Scherer,op.cit). It is interesting to note that the composition of the present ivory relief is similar to a relief of the Crucifixion in the Danish National Museum, Copenhagen, attributed to Christophe Angermaier (cf. Philippowich, op.cit.).