After a model by Guglielmo della Porta (circa 1500-1577) Italian, Rome, late 16th/ 17th century

Overall the condition of the terracotta is good with minor dirt and wear to the surface consistent with age. There has been some restoration to the corners and edges (particularly at the top), particularly visible at the reverse. There are some chips to the edges, including a larger one at the top right side. There are some very slight stable fissures, in particular around the main crucifix. There are some dark areas of discolouration, in particular at Christ's proper left knee and left hand. There is a loss to the Virgin's proper right index finger, with small fissures in this area. There is a small drilled hole to the reverse. There is minor wear and non-active worming to the wood frame.
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."

The present relief is near-identical in composition to a marble relief by Guglielmo della Porta in the Museo di Castello Sforzesco, Milan. There is also a bronze version from the collection of J. Pierpont Morgan, which is now in the University of Michigan Museum, Ann Arbor. Only certain small details, such as the tree in the top right corner, and the wider background landscape, are modelled differently. Avery (op.cit., p. 121) mentions that several versions in materials such as terracotta and papier-maché exist.

RELATED LITERATURE
R. Coppel, "Guglielmo della Porta in Rome" and C. Avery, "Guglielmo della Porta's relationship with Michelangelo", Guglielmo della Porta. A Counter-Reformation sculptor, exh. cat. Coll y Cortés, Madrid, pp. 40-41, fig. 18 and pp. 118-121, figs. 68-69

Sotheby's would like to thank Dr Charles Avery for his assistance in cataloguing this lot.