Calvairate is a district of Milan, Italy. It is part of the Zone 4 administrative division, located east of the city centre. A small rural settlement in the area of Calvairate is reported at least from the 16th century. The centre of the settlement was located in what is now Piazzale Martini. In the 19th century the borgo, which was then part of the comune of Corpi Santi, quickly developed, and was annexed to Milan in 1873.