Sankt Thekla church, Baroque parish church in Wieden, Vienna, Austria.

Sankt Thekla is a Baroque church built in Vienna's Wieden district in 1756 as a religious facility for the Piarist Order. The interior features elaborate stucco work by Jakob Philipp Kegelsperger and Pietro Orsatti that adorns the walls and architectural elements throughout the space.

The Piarists received permission in 1751 to build a church and monastery in Wieden and bought the plot in 1752. The church, designed by Mathias Gerl, was consecrated on 26 September 1756. In 2017 St. Thekla became one of four parish communities of the newly created Pfarre zur Frohen Botschaft.

The church is dedicated to Saint Thekla, and the altarpieces of Thekla, the Immaculate Conception and the order's founder José Calasanz were painted by Felix Ivo Leicher. Since 2017 St. Thekla has been one of four parish communities of the newly created Pfarre zur Frohen Botschaft.

The church stands at Wiedner Hauptstraße 82 in the 4th district, Wieden, its entrance set in the street front of the former Piarist monastery complex. Since 2017 it has been one of four parish communities of the Pfarre zur Frohen Botschaft, so service times follow that parish's schedule rather than a separate St. Thekla parish.

The organ was built in 1926 by Johann M. Kauffmann and has two manuals and a pedalboard. Felix Ivo Leicher painted the altarpieces of St. Thekla, the Immaculate Conception and St. José Calasanz; his frescoes on the gables of the church and college are no longer preserved.