PALLADIO, Andrea. The Architecture of A. Palladio… containing a Short Treatise of the Five Orders, and the Most Necessary Observations concerning all Sorts of Building… Revis'd, Design'd, and Publish'd by Giacomo Leoni, a Venetian. London: John Darby for the Author, 1721. Vol. 1 (of 2). Second edition, folio (467 x 283mm.) 2 books in 1, allegorical frontispiece by B. Picart after Sebastian Ricci, list of subscribers, engraved headpieces and initials, 103 engraved plates by John Vantack. (Spotting to preliminaries, browning, front and rear blanks replaced, lacking plate no. 37, lacking portrait.) 19th Century brown half calf over cloth-covered boards, gilt lettering to spine (rubbing to extremities, endpapers replaced).