The Ca' Rezzonico is itself a fine specimen of the 18th-century Venetian art for which it is now a museum.
The Ca' Rezzonico is the finest piece of art of the 18th century.
mnli hypothesis: The Ca' Rezzonico is the finest piece of art of the 18th century. premise: The Ca' Rezzonico is itself a fine specimen of the 18th-century Venetian art for which it is now a museum.