This rich baroque altar dated 1711 keeps the shrine containing one of the most famous relics of Venice, the Precious Blood of Christ, formerly in Constantinople and brought to Venice by the Venetian Fleet Commander Melchiorre Trevisan, who presented it to the Frari upon his return from the East. The altar is adorned with three bas-reliefs in Carrara marble representing the Crucifixation, the Deposition and the Entombing of Jesus Christ. The works are by the Venetian Francesco Penso, known as Cabianca. The central part and the top of the altar are enriched with fine gilt wood carvings by Andrea Brustolon from Belluno ( 1662-1732 ).