Giovanni Battista Piranesi 3 etchings

Giovanni Battista Piranesi (Italian 1720-1778)- 3 etchings from ''Della Magnificenza ed Architettura de Romani'', 1758-61 (pub. 1761)- 1.) ''Columna Porphyretica Cum Spira, in Baptisterio Constantini Magni Imperatoris'', Plate IX, (Focillon 941)(Wilton-Ely 769), 18 1/4 x 10 3/4''; 2.) ''Various Column Bases and Capitals'', Plate X, (F. 942)(WE. 770), 18 1/4 x 10 3/4''; 3.) ''Various Capitals'', Plate XII, (F. 944)(WE. 772), 18 1/4 x 10 3/4''