The patron of Mignano Monte Lungo is Saint Anthony of Padua, celebrated on 13 June.
The town holds the Castello Ettore Fieramosca, built in tuff stone, whose construction owes much to Guido Fieramosca. At the foot of Monte Lungo lie the Military Museum, which gathers documents and finds, and the Military Shrine, opened in 1951, where soldiers who fell between 1943 and 1944 rest.