This is the paper and resin version of the coral stone inlay Sant’Agostino (Rome) floor plan pendant — part of my architectural floor plan series of fortresses, castles, villas, & churches in Italy. The frame was hand-sawed from 1mm sterling silver sheet to the scale of the diagram found in a vintage Italian travel guide. The silver has been antiqued with liver of sulfur, and resin protects the paper.
The frame is soldered onto a back sheet of silver. Before the paper is meticulously cut and placed into the frame, the pendant looks like this below (oxidized version and silver version). It measures 38x54mm.
See similar pendants in the paper and resin series: Villa Giulia, Castel del Monte, and Barletta Castle.