Tiepolo in Milan: The Lost Frescoes of Palazzo Archinto brings together preparatory drawings and paintings, as well as documentary photographs, to commemorate an extraordinary fresco cycle by the Venetian painter Giambattista Tiepolo (1696–1770). Painted for Palazzo Archinto in Milan, the frescoes were destroyed in a bombing during World War II. The catalogue accompanies an exhibition at The Frick Collection. In 1730–31, Tiepolo undertook his first significant project outside the Veneto, frescoes for five ceilings in Palazzo Archinto in Milan. The paintings were commissioned by Count Carlo Archinto (1670–1732), likely in honor of the marriage of his son, Filippo, to Giulia Borromeo. Tiepolo’s mythological and allegorical scenes―Triumph of Arts and Sciences; Apollo and Phaëton; Perseus and Andromeda; Juno, Fortune, and Venus; and Nobility―were painted in some of the largest rooms of the palazzo. Unfortunately, the palazzo was bombed during World War II and its interior completely destroyed. Only a series of black-and-white photographs, taken between 1897 and the late 1930s, preserves the frescoes’ appearance, but a number of preparatory drawings and paintings provide precious information, including three painted sketches (Triumph of Arts and Sciences, the Museu Nacional de Arte Antiga, Lisbon; Apollo