Holy Cross Church, Külsőferencváros, Catholic parish church in Külsőferencváros, Budapest, Hungary.

Holy Cross Church is a twin-towered Neo-Romanesque church at Üllői út 145 in Külsőferencváros, Budapest, built in 1930 to plans by architect Fábián Gáspár. Its symmetrical facade has two towers flanking the entrance, and the interior is a three-nave basilica-like space with many frescoes.

A Catholic society formed in Külsőferencváros in 1921 to build a chapel or church, and from the next year Masses were held in a nearby school. A parish was founded in 1925, and the twin-towered Neo-Romanesque church, designed by Gáspár Fábián at Üllői út 145, opened in 1930. A parish house followed in 1941, and full renovation was completed in 2003.

The parish was founded in 1925, and the church's patronal feast, the Exaltation of the Holy Cross, is celebrated on 14 September with a kermis. Masses were first held in a nearby school from 1922, then in a temporary chapel in a converted dwelling.

The church stands at the junction of Üllői út and a major crossroads in outer Ferencváros, framed by tram and railway tracks, so it is reached on foot from the nearby tram and rail stops. Its two symmetrical towers and central entrance face the intersection, making the facade the easiest orientation point. The full renovation was completed in 2003.

The stained glass windows tell religious stories and shift in appearance throughout the day as natural light changes. This play of colored light creates unexpected moments of beauty that catch many visitors by surprise.