Heiligengeistkirche Klagenfurt, Baroque church in Klagenfurt, Austria.

Heiligengeistkirche is a Baroque church featuring a single-nave hall with four bays and a barrel vault supported by pilasters adorned with regional coats of arms. The interior creates a tall, enclosed space with classical Baroque proportions.

First mentioned in 1355, the church was recorded with a cemetery and hospital in 1381. From 1563 to the Counter-Reformation around 1600 it served as a Protestant prayer house and was rebuilt in 1582. Adam Kolerig largely rebuilt it between 1630 and 1639; Bishop Leonhard of Lavant consecrated it. In 1670 the Carinthian estates gave it to the Ursulines.

The ceiling features two large paintings by Josef and August Veiter from 1886, depicting the Birth of Christ and the Ascension, which dominate the interior.

The church is built into the 17th-century convent, so the side facing Heiligengeistplatz is its show facade, not a free-standing west front. The main portal on this south side has a classicist porch of around 1800 with paired columns, reworked by Werner Hofmeister in 2014. The west tower carries a tiered onion dome.

The prayer benches from 1740 display intricate inlay decorations that preserve 18th-century craftsmanship. These fine details are often overlooked but reveal the careful attention given to earlier church furnishings.