Piarist Church
Piarist Church in Vienna
Religion
Affiliation	Catholic Church
Leadership	P. Miroslaw Baranski SP[1]
Year consecrated	1719
Location
Location	Vienna, Austria
Shown within Vienna Show map of Vienna Piarist Church, Vienna (Austria) Show map of Austria
Geographic coordinates	48°12′38″N 16°20′57″E / 48.2105°N 16.3492°E / 48.2105; 16.3492
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.mariatreu.at

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.

The church has six chapels and is decorated with frescoes made by Franz Anton Maulbertsch in 1752–53.

Commissioned by the Piarists, Haydn's Missa in Tempore Belli (Mass in Time of War, sometimes known as the Paukenmesse or Kettledrum Mass) was first performed on 26 December 1796.

Media related to Piarist Church, Vienna at Wikimedia Commons

• High resolution Gb picture of the interior of the Church