English: Fig. 1.—Square of St Mark and surrounding buildings. The original campo was bounded on the west by the canal B, with the 6th-century church of S. Geminiano, C, on its west bank. The first enlargement of the square was effected by Doge Sebastiano Ziani in 1176, when he filled up the canal and rebuilt the church on a new site at D, thus nearly doubling the size of the square. Lastly, the square was extended southwards in the 16th century, when the new palace of the procurators, K, was built by Scamozzi. Gentile Bellini's picture shows a line of houses along FF, reaching up to the great campanile, A. Napoleon I. in 1805-10 pulled down the church of Geminiano and built a new block at the west end of the square, L. The dates of the various parts of the existing ducal palace are indicated on the plan; the rebuilding was carried on in the following order, P, Q, R, S, T, U, V., At Z is the treasury of St Mark, which was originally one of the towers belonging to the old ducal palace; E, site of old houses; G, clock tower; H, old palace of procurators; J, old library; M, two columns; N, Ponte della Paglia; O, Bridge of Sighs; W, Giants Staircase; X, sacristy of St Mark; Y, Piazzetta.