St. Peter's Parish Church, Parish church in Hrvatski trg, Ljubljana, Slovenia.

St. Peter's Parish Church is a Baroque church at the corner of Trubar, Njegoš and Zalog streets near Croatian Square in Ljubljana. It has a three-aisled basilica plan with a dome over the transept, an apsidal presbytery and two bell towers. The north tower holds the largest bell, the south tower four bells.

First mentioned in 1163 and confirmed as a parish church on 7 October 1262, it was burned by the Turks in 1472, as an inscription at the entrance records. Prince-Bishop Tomaž Hren had it renovated in 1618. The present Baroque basilica was begun in 1726 under vicar Nikolaj Ivan Kraškovec, blessed unfinished in 1728, and completed in 1731 to plans by Carlo Martinuzzi with a model by Giovanni Fusconi and construction by Gregor Maček.

The church gave its name to Trubar Street, called St. Peter's Street until 1952, and to the nearby St. Peter's Bridge over the Ljubljanica. The former barracks at Vraz Square also bore the name. Inside, the pulpit is the work of Carlo Bombasi from 1747, and the baptismal font in the presbytery was a gift of Bishop Tomaž Hren in 1611.

The church stands at the corner of Trubar, Njegoš and Zalog streets, opposite Croatian Square, next to the University Medical Centre. The entrance faces the small forecourt, where columns were added after the square was rearranged; the two statues of Saints Peter and Paul from 1850 were removed for wear. The bells hang in two towers: the largest in the north tower, four in the south.

In the 1930s the interior received modern mosaics and decorative additions that contrast with the classical baroque design. This update shows how the building adapted to new artistic styles while keeping its original framework intact.