had a roof and could be saved. Rezzonico hired the most prestigious architect of his time, Giorgio Massari (1687-1766), who had built the churches of the Jesuits and the church of the Pietà in Venice, as well as the palazzo of the Grassi family, which faced the Rezzonico palace on the other side of the Grand Canal. A Canaletto painting of the early 18th century shows only the ground floor and first piano nobile completed, and a temporary roof protecting the structure from the elements. The Rezzonicos rushed the reconstruction along. In 1752, the accidental dropping of a piece of marble caused the scaffolding to collapse, dropping five stonemasons to the ground below. Massari largely followed the original plan of Longhena, but made a number of modifications to suit the lighter rococo tastes. He removed some ponderous double columns on the facade replacing them with more slender pillars, and eliminated a heavy plinth of columns, giving the building a lighter, more graceful appearance. He also installed a row of small oval windows above the larger windows on the second floor, adding light and a rococo touch. The facade was finished between 1750 and 1752. Turning his attention to the interior, Massari broke with Venetian custom and put the major ceremonial room at the back of the building, not overlooking the canal. He doubled the height of the ceiling in this room and eliminated walls to create a more dramatic space. He laid out a ceremonial route that would take visitors from the dock and gateway on the Grand Canal to a fountain in the interior courtyard, surmounted by the coat of arms of the Rezzonico in marble; then taking a triumphal hallway to the monumental stairway which took them up to the grand salon or ballroom. As soon as the salons were completed, their ceilings were painted with frescoes by Giovanni Battista Crosato and in trompe-l'œil by Girolamo Mengozzi Colonna. The interior work was nearly finished in 1756. The pinnacle of the Rezzonico's power and the Palazzo's grandeur came in 1758, when Carlo, the younger brother of Giambattista Rezzonico, was elected Pope as Clement XIII, the same year Ludovico Rezzonico married Faustina Savorgnan, uniting the two richest families in Venice. To mark that occasion, Rezzonico commissioned the most celebrated painter of Venice, the aging Giovanni Battista Tiepolo, to paint the ceilings of two salons, along painters with Gaspare Diziani and