Paintings that are executed directly on to a wall. Media can include fresco (buon and secco), oils, tempera, casein and acrylics. In all cases the painter must take great care to see that the wall is stable, the surface firm and that it has been prepared correctly for the chosen medium. Jacopo Robusti, nicknamed Tintoretto, painted the largest mural during the Renaissance. With the help of his son Domenico he produced 'Il Paradiso' on Wall 'E' of the Sala del Maggior Consiglio in the Palazzo Ducale (Doge's Palace) in Venice. It is 72 ft 2 in (22 m) long and 22 ft 11 in (7 m) high and contains more than 100 figures. The largest painting in Britain is the great oval 'Triumph of Peace and Liberty' by Sir James Thornhill (1676-1734), on the ceiling of the Painted Hall in the Royal Naval College, Greenwich, Greater London. It measures 106 ft (32'3 m) by 51 ft (15.4m) and took Thornhill 20 years (1707-27) to complete.