The patrons of Pregnana Milanese are Saints Peter and Paul, celebrated on 29 June in the Parish Church of Santi Pietro e Paolo.
The church was built during the Second World War, designed by parish priest Don Giuseppe Fumagalli (1905-1991), and consecrated on 30 June 1945 by Cardinal Ildefonso Schuster, with solemn historic celebrations. The town also holds the Parco 25 aprile and the Parco Monsignor Giuseppe Fumagalli.