It is located in the place where the oldest religious building in the community was located. After the construction of 1703, it was called a "Chiesa Nuova" (en. "New Church"). In 1933 it was called the "Chiesa del Santissimo Crocifisso". The first documented reports on the old parish Church of Beata Vergine Assunta date back to 1750, the year of its expansion. The temple, in the Baroque style, had a single aisle that was complemented by side chapels. The apse was boasted of frescoes. The facade had a simple invoice, and was decorated with lesene. On the left of the facade was the bell tower, while on the right was the oratory of Saint Louis. The former parishioner finished his religious duties in October 1934. It was deconsecrated by archbishop's decree on 24 February 1936 and was sold by the parish on 9 January 1948. It was demolished in 1974. "Madonna di Baldeur" chapel was built in the area where the dead of the plague of 1630 were buried. Inside was visible the image of Our Lady with the Child. Every year a procession was made from San Giorgio to the chapel in commemoration of the dead from the plague, and a party followed the ceremony. It was demolished in 1986 for the construction of a road. In San Giorgio su Legnano there are some buildings of historical interest. The oldest, among those owned by the municipality, is the former town hall of San Giorgio su Legnano. Born as a home of elementary schools and municipal offices and situated in "via Gerli", it was inaugurated in 1892. It also housed classrooms until 1929, when the new schools were inaugurated. He served as a town hall until 1992. The building that houses the "Circolo familiare" was built in the early 20th century having a commercial function. Since 1936 he has been doing social activities. Another notable property is the kindergarten, which opened on 15 July 1909. There are several works designed by the famous architect Of sangiorgese Gino Maggioni in his home country. More specifically, they are the "Monumento ai caduti" (en. "monument to the fallen": opened in 1921), the cemetery (1928) and elementary schools (1929). Since 1992, the school plexus designed by Gino Maggioni has been used as a municipal seat.