Rome, 19th century View of St. Peter's Square paperweight in black marble with micromosaic cm 14 x 10 Micromosaic as an artistic language defined in the technical rules and in the field of invention was born in Rome in the last quarter of the eighteenth century. The city is the seat of the Vatican Mosaic Studio established in 1727 and boasts an excellence in the art of mosaic gained with the centuries-old undertaking of the decoration of the Vatican basilica, started in 1578 and not yet completed. The cultural context favors the study of antiquity both in terms of compositional rules and in terms of figurative content. Already at the end of the eighteenth century Piazza di Spagna and the adjacent streets, favorite places