View of a piazza with an obelisk and equestrian statues, perhaps a design for a theatre set

Italian School, 18th Century View of a piazza with an obelisk and equestrian statues, perhaps a design for a theatre set inscribed with numerical references above many of the buildings black chalk, pen and brown ink, brown wash, indistinct watermark, unframed 9 1/8 x 13 in. (23.5 x 33 cm.)