sentence1: To the west of the Accademia, the Ca' Rezzonico is another canal-side design of Longhena, completed in the 18th century and now a museum (reopened in 2000) dedicated to those swan-song years of the Venice's Most Serene Republic, la Serenissima.
sentence2: The museum, a design of Longhena, is dedicated to la Serenissima.