Of rectangular form, the lid and sides with micromosaic panels with Roman views: St Peter's basilica and square, the Pantheon, the Coliseum, the Temple of Vesta, the Temple of Vespasian in the Roman forum, the Arch of Titus, the Tomb of Cecilia Metella.

After the micromosaic technique was mastered in the early 19th Century many workshops flourished in Rome, selling views of the Eternal City in micromosaic form for mounting on jewellery, jewel caskets and larger works of art.