View this artwork by appointment, at Tate Britain's Prints and Drawings Rooms
Turner’s location for this distant view of the Duomo and tower of the Palazzo Vecchio, Florence is the Piazza Cavour (present-day Piazza della Libertà) and the Porta San Gallo, the northernmost entry gate to the city. The structure dominating the right-hand side of the composition is a triumphal arch, erected during the early eighteenth century to celebrate the succession of Habsburg-Lorraine rule from the Medicis in 1737. Further sketches can be seen on folios 59 and 70 (D16583 and D16603).
Part of the page has been torn away, presumably before the sketch was made.