Alchemical door The alchemical gate,located in Via Umberto I, is a monumental 16th-century arch decorated with esoteric bas-reliefs,whose symbolism is, however, different from that of the better known Alchemical Gate of Rome. The arch today gives access to a small park,[4] but in the past it was the main access of a palace that no longer exists today (Palazzo Camiciotti). A recent study, carried out by Franco Lelli, places the artifact in the second half of the 1700s and wants it destined to adorn the entrance to the house of a couple of young spouses.