This highly important mid-19th century Roman micromosaic was crafted by the Italian artisan Luigi Gallandt. Monumental micromosaic panels of this giant scale are rare and extraordinarily valuable, and they were nearly always made either by special private commission or as papal gifts. Gallandt’s micromosaics are particularly prized for their high attention to detail and subtle handling of color. This example — a stunning veduta of the Colosseum — was once part of the famed Rosalinde and Arthur G