 For a period ending in the early 16th century the boundaries of what could be depicted in for display in the semi-privacy of a Renaissance palace seemed uncertain.Michelangelo's "Leda" was a fairly large painting showing sex in progress, and one of the hundreds of illustrations to the book the "Hypnerotomachia Poliphili" of 1499 shows Leda and the Swan having sex on top of a triumphal car watched by a crowd.In the 16th century an attempt to print erotic material caused a scandal when the well-known Italian artist Marcantonio Raimondi published "I Modi" in 1524, an illustrated book of 16 "postures" or sexual positions.