The Triumphal Arch of Alexandria is an important monument of the city built in 1768, designed by Giuseppe Caselli, to commemorate the visit in 1765 of Vittorio Amedeo III and Maria Antonia Ferdinanda di Borbone, king and queen of the Kingdom of Sardinia. With a very light structure and no architectural functionality other than those related to the monumentality itself, the Arch has a diffused red colouration, with two orders, whose upper part houses the epigraph that recalls the visit to the city of the Savoy royal family.