Santa Maria Regina Pacis a Ostia Lido is a 20th-century parochial church and titular church in Ostia, southwest of Rome, dedicated to Mary, Queen of Peace.

[2][3][4][5] In 1916, it was suggested to Vincenzo Vannutelli, Bishop of Ostia, to construct a church to Our Lady, Queen of Peace, in order to pray for an end to the First World War.

[12][13][14] In basilica form with side chapels and transept.

The nave is covered by a round vault divided into sections, sculpted by the lunettes of the side windows.

The internal columns are 8 m (26 ft) high under the cornice, in imitation hammered travertine with octagonal plinths and Corinthian capitals.