(attributed, but probably wrongly, to Giovanni Pisano by Vasari), and in its east front a Gothic window with stained glass by Fra Bartolommeo of Perugia (1441).
The arsenal, which was famous in Dante's day, received its first enlargement in 1304, when, on the design of Andrea Pisano, new building sheds and the rope walk or Tana were erected.
The splendid west front, of tricuspidal form, enriched with a multitude of columns, statues and inlaid marbles, is said to have been begun by Giovanni Pisano, but really dates from after 1370; it was finished in 1380, and closely resembles that of Orvieto, which is earlier in date (begun in 1310).
Conspicuous among the art treasures of the interior is the well-known octagonal pulpit by Niccola Pisano, dating from 1266-1268.
Amongst the secular buildings may be mentioned the royal palace; the archiepiscopal palace; the palace of the order of St Stephen, built by Niccola Pisano and reconstructed by Vasari; the Upezzinghi (formerly Lanfreducci) palace, built of Carrara marble in 1590; the Lanfranchi, Agostini and other palaces; the university (1472); a large hospital (1258); and fine market halls.