The Oratorio del Gonfalone or Oratory of the Banner is a building in Central Rome which once housed a Catholic fraternity. Since about 1960 it has served as a concert venue for the Roman Polyphonic Choir.

The Confraternity of the Gonfalone was a group of white penitents (due to the colour of their robe). The association was first established in 1264 the church of Santa Maria in Aracoeli, under the name of the Accomandati di Madonna Santa Maria. It came to be called the Gonfalone Confraternity because of the banner carried in processions.

Over the centuries the group dedicated itself to various activities, including the participation in religious processions as banner carriers (wearing white gowns with peaked blue hoods), and also of putting on a yearly passion play. They also were involved in charity towards the poor and needy, and during 1581–1765, of freeing Italians enslaved in Muslim and Slavic lands.