Sheet 4, Anteiqvae vrbis imago accvratissime ex vetvsteis monvmenteis formata, Bossius, Antonius, 16th cent., Ligorio, Pirro, ca. 1510-1583, Engraving, 15--, The 12 constituent sheets have been joined in pairs with a vertical overlap to form 6 sheets, each measuring 52 x 76 cm. and hinged in at the centerfold. If arranged in 3 horizontal rows of 2 each, the 6 double sheets would form an impression ca. 130 x 144 cm.: aerial view of Rome, 16th century. Relief shown pictorially; oriented with east at top.