How many revisions did the heads of the crouching figure undergo ?
The " Crouching Venus " excavated at Salona ( modern Solin near Split , Croatia ) in the second half of the 18th century was purchased for the Vatican Museums , where it was etched by Francesco , the son of Giovanni Battista Piranesi , then confiscated by the French under Napoleon but returned to the Vatican in 1816 , where it remains .