1 Grosso - Clement XIII Lateran Possess

Clement XIII's pontificate began in 1758 with this grosso struck to commemorate his formal taking of possession of the Lateran Basilica — the ceremonial procession known as the possesso, traditionally held shortly after a pope's coronation. The rite dated back to the medieval papacy and carried considerable political weight, asserting the bishop of Rome's authority over his cathedral church rather than solely over St. Peter's. Clement XIII would go on to become one of the most embattled popes of the eighteenth century, spending much of his reign in open conflict with the Bourbon monarchies over the suppression of the Jesuits.

These possesso issues were struck in limited quantities for ceremonial distribution rather than general circulation.