Along the Grand Canal the number of "fondaco" houses increased, buildings combining the warehouse on the canal level and the merchant's residence above. Ca' Sagredo started in this manner, with alterations by Andrea Tirali in the 18th century. (The Sagredo acquired the building from a branch of the Morosini in the 18th century.) The interior decoration includes a three-flight staircase by Tirali and paintings by Pietro Longhi, Andrea Urbani and Giovanni Battista Tiepolo. The facade has been altered but still shows elements of the Italo-Byzantine style.