Ägydiuskirche, Baroque church in Währing, Vienna, Austria.

The Ägydiuskirche is a late-Baroque, single-nave church with a rectangular interior and rounded corners. Its square tower is integrated into the facade. Two Baroque tombstones stand against the north wall, and a mascaron in a wall niche pours water from the Pötzleinsdorf spring.

A chapel dedicated to Mary and Saint William was first recorded in Pötzleinsdorf in 1529; it burned down in 1683 during the Second Turkish Siege of Vienna and was rebuilt. In 1746 it was enlarged into a church, which the great village fire of 1750 destroyed along with 31 of 32 houses. Construction of the present church began in 1752 on land donated by Countess Negrelli to the Himmelpfortkloster; the old site is unknown. It became a parish church in 1784 and a subsidiary church on 1 September 1964.

The church is dedicated to Saint Giles, shown on a side altar painted by Johann Nepomuk Steiner. A 17th-century icon-like Marian image hangs above the tabernacle with adoring angels, and the marble baptismal font is crowned by a metal copy of a figure of John the Baptist, replacing a stolen ivory original.

The church stands in Pötzleinsdorf in Vienna's 18th district, Währing. Tram line 40 or 41 runs to the Pötzleinsdorf stop; from there it is a short walk. The interior was renovated in summer 2002. As a subsidiary church of the Christkönig parish, it is not the district's main parish church.

The tower's original bells were removed for armaments in both World Wars; four bells now hang there. In a wall niche, a maskaron spout pours water from the Pötzleinsdorfer Quelle, once credited with healing properties. Two baroque gravestones stand against the north wall outside.