Stiftskirche St. Johann, Medieval collegiate church in Regensburg, Germany.

Stiftskirche St. Johann stands at Krauterermarkt 5 between Domplatz and the Bischofshof. The pale yellow church has a red tiled roof, a curved gable with a cross, a small pointed turret with a green finial and a green cupola with a clock on the ridge. Inside, white vaulting, a crystal chandelier, a golden altarpiece and painted frescoes on the side walls.

St. Johann was founded in 1127 as a collegiate foundation dedicated to John the Baptist and John the Evangelist. Its predecessor, an Ottonian baptismal church of the old cathedral, is linked to the baptism of fourteen Bohemian princes in 845, recalled by a plaque on the north outer wall since 1995. The Gothic new building on the present site was largely finished by 1381, after the old church had to give way to the westward extension of the cathedral; a fire in 1887 led to a neo-Baroque rebuilding.

The church is dedicated to two saints: John the Baptist, whose feast day is 24 June, and John the Evangelist, celebrated on 27 December. A plaque on the north outer wall, placed in 1995, recalls the baptism of fourteen Bohemian princes here in 845.

The church sits centrally in Regensburg and welcomes visitors through its main entrance during standard operating hours. Guided tours can be arranged in advance to explore the interior more thoroughly.

The tower clock installed in 1628 still runs with a four-week winding cycle, and two bells cast that same year by Ulrich Deugner hang in the church. A plaque on the north outer wall, placed in 1995, marks the baptism of fourteen Bohemian princes in 845, which tradition links to this site.