The Heiligen-Geist-Kapelle in Bruck an der Mur, Styria, Austria, is a chapel named for the Holy Spirit. It was built in late-Gothic style, originally dedicated to the Trinity, which explains its unusual triangular floorplan, with three similar walls, all with a portal. The building fell into disrepair in the 18th century and was used for several purposes such as a postmaster's stable, an inn and for housing, which changed the interior. Initiated by Philipp Harnoncourt in 2011, the building was restored to its original appearance, with new features where no trace of the original could be found. It is a unique listed historic monument of more than regional importance.