Signature, title and year at the back on the frame. Castellani Archive, Milan authenticity certificate on photo (photocopy). The piece is a fragment of a dispersed polyptych, consisting of 9 elements, whose total perimeter is characterized by four bands treated with resin and the central part of which appears as one of its classic relief paintings painted in white. The 8 elements that are placed around the central canvas are therefore characterized by a relief part and by a resin treated one or two sides depending on where they were arranged within the composition. In the case of the work presented, this is the canvas that occupied the central part of the left. All the elements of the polyptych have been archived a singular pieces of the lost composition.