Beyond, upon the right, is a splendid alto-relief by Algardi, representing Leo threatening Attila with the vengeance of Peter and Paul if he should attack the holy city of Rome. It is the largest relief ever executed. A circular marble slab below it marks the tomb of Leo XII. Upon the right, coming down the aisle, is the tomb of Alexander VII., by Bernini. Justice, Prudence, Charity, and Truth surround the kneeling pontiff. A bronze gilt figure of Death supports the marble canopy. The naked Truth was clothed in tin by Innocent XI. Opposite is Vanni's oil-painting, the Fall of Simon Magus. The south transept contains mosaics of S. Thomas by Camuccini, the Crucifixion by Guido, and S. Francis by Domenichino. On the left is the chair of the Grand Penitentiary, where great princes have to make their public confession as pilgrims. Returning to the aisle, on the right is the tomb of Pius VIII., by Tenerani. Our Saviour is blessing the Pope; Peter and Paul are on either side; Justice and Mercy are represented in relief below. Opposite is a mosaic of Ananias and Sapphira after Roncalli. Beyond is the Miracle of Gregory the Great, by Sacchi. Facing us is the tomb of Pius VII., by Thorwaldsen. History and Time support him on either side, with Power and Wisdom below. On the left, nearly opposite, is a mosaic copy of Raphael's Transfiguration. Proceeding down the aisle, on our right, is the tomb of Leo XI., with a relief, by Algardi, representing the abjuration of Henry IV. of France. Opposite is the tomb of Innocent XI., with relief of the raising of the siege of Vienna by John Sobieski, with figures of Religion and Justice, by Monot.