The Baptistery and the Zeno Chapel, entered from the right aisle, originally formed part of the atrium. The mosaics in the Baptistery were executed by the order of Doge Andrea Dandolo (1343-54), but have been partly restored[91] by the Venezia-Murano Company. In the lunette above the altar is the Crucifixion. Weeping angels hover over the cross; L., are the Virgin and St Mark; R., St John the Evangelist and St John the Baptist. At the foot of the cross kneels Doge Andrea Dandolo; at the extreme ends kneel his Grand Chancellor, Riafano Caresini, and a Senator. The table of the altar is formed of a massive block of Egyptian granite from which Christ is said to have preached, brought from the siege of Tyre in 1126. In the centre of the cupola above is Christ enthroned; below is a ten-winged angel bearing on his breast the inscription—“Fulness of Wisdom.” This is the first of the nine Intelligences circling the cupola, which in mediæval cosmogony ruled over the nine heavenly spheres.

The story of the Baptist’s life is told in the lunettes and on the walls. The mosaic of the Burial of the Saint’s Body is said by Ruskin to be the most beautiful design of the Baptist’s death that he knew in Italy.

In the centre of the cupola over the font is a figure of Christ seated on a double rainbow and holding a scroll on which is inscribed the injunction to the Twelve to go and preach the gospel to all creatures. Beneath, each is seen obeying the command in that country where tradition places his martyrdom. Quaint local costumes are introduced, and converts are being baptised.

Opposite the entrance is the tomb of Andrea Dandolo, the last Doge buried in St Mark’s. On the workmanship of this beautiful example of fourteenth-century monumental art Ruskin has lavished ecstatic praise. Beneath the noble, peaceful figure of the Doge are the Virgin and Child, two scenes from the Martyrdom of St John the Baptist and of Andrew, the Doge’s patron saint, and an Annunciation. The long Latin epitaph has been attributed to Petrarch.

The vault of the vestibule of the Cappella Zen is decorated with scenes from the life of Christ before His baptism. The tomb in the recess is that of Doge Giovanni Soranzo (1328). The Cappella Zen contains the monument of Cardinal Zeno, executed at the beginning of the sixteenth century. The altar is dedicated to the Virgin of the Slipper, whose figure in bronze has a gilded shoe, in perpetual memory of the miraculous alchemy by which her slipper, given to a poor votary, was changed to gold. The Zeno tomb is a fine Renaissance work in bronze which, together with the altar, was designed by the Lombardi and Aless. Leopardi (p. [191]). The walls of the chapel are decorated with the history of St Mark.

In the little chapel of the Madonna dei Mascoli at the W. angle of the N. transept, where of old a guild of men used to assemble, are some fine fifteenth-century mosaics by Michele Giambono. They are unhappily injured by restoration, but in the main the early Renaissance feeling has been preserved and the more natural modelling of the figures and fuller architectural detail form a pleasing contrast to the stiff and sometimes hard design of the Byzantine workmen.

East of this is the richly decorated chapel of St Isidore founded by the same Doge and scholar who decorated the Baptistery. The work was not, however, completed until 1355 under Dom. Gradenigo. The inscription over the altar tells that the body of the Blessed Isidore was brought from Chios in 1125 by Doge Dom. Michiel and now rests in the tomb below. The sculptured figure of the saint and the reliefs to left and right representing his martyrdom are fine work. The fourteenth-century mosaics so faithfully wrought by the artists of that great epoch have needed but slight repair and remain practically as they left them. Over the altar is Christ seated between S. Mark and Isidore, and balancing this at the opposite end are the Virgin and Child, the Baptist and St Nicholas. The legend of the saint is illustrated on the walls. In this chapel we are standing within part of the actual fabric of the old church of St Theodore. When the S. wall of the chapel was peeled in 1832 it was found to be blackened by exposure to the weather and pierced by a window with an iron grille.

The group of worshippers ever before the altar to the left as the visitor leaves this chapel will tell him that he is approaching the shrine of the Virgin. Under a canopy is the miraculous Nicopeian icon of the Virgin which was captured from Murzuphles and formed part of the spoil of Constantinople. Doge Dandolo sent it to Venice in a specially appointed ship, and in 1618 the present altar was raised by Doge Giov. Bembo. The image (only exposed on Saturdays) was traditionally painted by St Luke. It is lavishly decorated with precious stones and surrounded by ex-votos.

Passing the altar of St Paul, bearing a statue of the saint and a fine relief of the scene of his blindness, the chapel of St Peter is reached. In front is a screen with statues of the Virgin and Child and four women saints, the Massegne. In the apse of this chapel is the entrance to the Sacristy, one of the most beautiful chambers in Europe. The magnificent mosaic ceiling designed by Titian and wrought with perfect art; the rich marble decorations; the symmetry and proportion of the architecture; the chastened glow of colour will not fail to impress the spectator.