| Piarist Church | |
|---|---|
_-_Piaristenkirche.JPG) Piarist Church in Vienna | |
| Religion | |
| Affiliation | Catholic Church |
| Leadership | P. Miroslaw Baranski SP[1] |
| Year consecrated | 1719 |
| Location | |
| Location | Vienna, Austria |
  Shown within Vienna  Piarist Church, Vienna (Austria) | |
| Geographic coordinates | 48°12′38″N 16°20′57″E / 48.2105°N 16.3492°E |
| Architecture | |
| Architect(s) | Johann Lukas von Hildebrandt, Mathias Gerl |
| Type | Church |
| Style | Baroque |
| Groundbreaking | 1698 |
| Completed | 1753 |
| Specifications | |
| Direction of façade | NE |
| Length | 55 m |
| Width | 40 m |
| Width (nave) | 15 m |
| Height (max) | 42,8m |
| Website | |
| www | |
The Piarist Church, also known as the Church of Maria Treu, is a Baroque parish church of the Order of the Piarists (Patres Scholarum Piarum) in Vienna, Austria. It is located in Vienna's 8th district (Josefstadt). The Piaristenkirche was elevated to the rank of Basilica Minor in 1949.
The right tower has an approximate height of 42.8m as measured and calculated by the 5C class of the Piaristengymnasium in the school year of 2021/2022.