 In Venice, he often worked closely with Tiepolo in planning interior decoration of palaces.Among his masterpieces are the Chiesa dei Gesuati (1726–43) located in Dorsoduro, Venice and the Palazzo Grassi-Stucky (1749).In the latter, Massari executed a traditional elegant marble-fronted Grand Canal palace facade, with Baroque rhythms and variations to the arrangement of bays, disrupting the classical simplicity.