Google Translation: in 1864 by the architect Giuseppe Mengoni Victor Emmanuel Gallery was officially opened on 15.09.1867 in presence of the king . The Italians call Galleria Vittorio Emanuele II , named after some of Italy . The covered shopping gallery from the 19th Century stands right next to the Duomo . It opens to the Piazza del Duomo with a triumphal arch . The building of the Galleria Vittorio Emanuele II are extravagantly decorated with frescoes, marble and stucco . A ton glass roof spans the two intersecting passages . At their intersection is an octagonal square with 39 meters in diameter. Located above the Octagon this glass dome at its highest point has a height of 47 meters . In the floor there are four large mosaics are the arms of the cities of Rome, Florence , Turin and Milan . The Victor Emmanuel Gallery is high-priced shops like Prada, Massimo Dutti , Gucci and Louis Vuitton have settled . Even restaurants like Savini or the bar Camparino of Gaspare Campari are at home .