 Although the late 16th-century engraving depicts the dome as having a hemispherical profile, the dome of Michelangelo's model is somewhat ovoid and the final product, as completed by Giacomo della Porta, is more so.In his old age, Michelangelo created a number of "Pietàs" in which he apparently reflects upon mortality.They are heralded by the "Victory", perhaps created for the tomb of Pope Julius II but left unfinished.