The structure consists of two glass-vaulted arcades intersecting in an octagon covering the street connecting Piazza del Duomo to Piazza della Scala. The street is covered by an arching glass and cast iron roof, a popular design for 19th-century arcades, such as the Burlington Arcade in London, which was the prototype for larger glazed shopping arcades, beginning with the Saint-Hubert Gallery in Brussels, the Passazh in St Petersburg, the Galleria Umberto I in Naples and the Budapest Galleria. The central octagonal space is topped with a glass dome. The Milanese Galleria was larger in scale than its predecessors and was an important step in the evolution of the modern glazed and enclosed shopping mall, of which it was the direct progenitor. It has inspired the use of the term galleria for many other shopping arcades and malls. On the ground of the central octagonal, there are four mosaics portraying the coat of arms of the three capitals of the Kingdom of Italy plus Milan's. Tradition says that if a person spins around three times with a heel on the testicles of the bull from Turin coat of arms this will bring good luck. This practice causes damage to the mosaic: a hole developed on the place of the bull's genitals. The Galleria connects two of Milan's most famous landmarks: The Duomo and the Teatro Alla Scala, but the Galleria is a landmark in its own right.
The iron-and-glass roof
The Milan gallery and its roof have been acknowledged as an important reference on 19th-century iron-and-glass architecture by Pevsner and Hitchcock. As one can still observe today, the roof consists of four barrel vaults that are crowned with a huge dome. Jorini pointed out the accomplishments of this dome with special regard to the large dimensions. Each of the roof parts is topped with a lantern. According to Geist, the Milan gallery and the roof were unprecedented in dimensions by previously built shopping arcades. Another difference with already existing passages, was the monumental character of the roof at Milan. Jodice, for example, appreciated the monumental spatial effect of the dome. In comparison to earlier emblematic arcades, such as Galerie d'Orléans and Galeries Royales Saint-Hubert, the Milan arcade was also special because of the large spans of the vaults and the ethereal effect of the entire glass canopy. The construction of the whole Gallery was the result of international collaboration. This especially concerned the roof: the ironwork was produced, transported and installed by the French Atelier Henry Joret. The glass plates were made of flat ribbed glass by Saint-Gobain. The construction technology of the roof employs primary wrought-iron arches in order to support the glazing. By contrast, arcades that were built earlier were smaller and had simpler roofs: the same components were used for both load bearing and glazing purposes. In addition, the roof at Milan was equipped with invisible reinforcements in the supporting walls. This complicated roof is discussed as the unity of four systems that were skillfully combined through characteristic construction details. This construction technology was creative for avoiding visible tie-rods in the spans of the vaults and the dome, for a special effect of the glass plates and for the glazing bars. The historical roof was heavily damaged during World War II. Before that the roof had undergone multiple maintenance interventions. Serious problems in the roof were reported in the 1970s, and some of them were solved in the 1980s. The roof that we see today has gone through different historic modifications and represents complicated conservation issues. In 2015, in preparation for Expo Milano 2015, the facades, statues, and mosaics underwent detailed cleaning and repair, using a giant moving crane scaffolding system.
Shops, restaurants and hotels
The Galleria is often nicknamed il salotto di Milano, due to its numerous shops and importance as a common Milanese meeting and dining place. As of 2013, the arcade principally contains luxury retailers selling haute couture, jewelry, books and paintings, as well as restaurants, cafés, bars, and a hotel, the Town House Galleria. The Galleria is famous for being home to some of the oldest shops and restaurants in Milan, such as Biffi Caffè, the Savini restaurant, Borsalino hat-shop and the Art Nouveau classic Camparino. In 2012, a McDonald's restaurant was prevented from renewing its tenancy, after 20 years of occupancy. The restaurant contended that it was the only tenant to be denied the right of first refusal on its new lease, and that the public tender to replace it was "unfair". McDonald's sued the landlord—the city of Milan—for in damages, alleging that the loss of the lease will deprive McDonald's of per year in sales. During its last few hours of operation, the restaurant offered free food and drink to over customers. The McDonald's restaurant was replaced with the gallery's second Prada store. McDonald's renounced its suit against the City of Milan after receiving the opportunity to open a new restaurant in a nearby area.
