Bust of Gregory XVI, in pontifical robes, left., Representation of Civitavecchia (Centum Cellae), turreted, seated, her hand on the altar, behind her, a prow and a view of the city's harbour., Medal for the renovation and extension of the harbour of the city of Civitavecchia (Centum Cellae) by Gregory XVI. Mark on the edge at 12h, possible trace of mounting as a jewellery. Bartolotti E836. With its collector's ticket., GREGORIVS • XVI • PONT • MAX • AN • VI, CENTVMCELL • VRBE • AMPLIFICATA // PORTV REDDITO / TVTIORE