The four Evangelists are depicted inside niches, while the ovals show the martyrdom of St. John the Baptist, San Lorenzo and San Sebastiano. The date and the name of the author can be read on the front bottom right: «Melchior Suez Ann. Dom. MDIC ": the artist was commissioned to reuse the four statues of the Evangelists which had been produced in 1568 in Antwerp for an earlier proposed design of the Corpus Domini processional ark.