Around 1600, the court master Matthäus Häring administered the Salzburg archbishop's estate of Arnsdorf. When his daughter fell seriously ill, he vowed to build a chapel in front of an image of the Virgin Mary if his child recovered. This happened, he built the chapel and erected the image of the Virgin Mary for public veneration.
The chapel was soon expanded into a small church and from 1645 the Servites looked after the pilgrims. In the plague years of 1630, 1634, 1646-50, 1679-81 and 1714, "Maria, Heil der Kranken" became one of the most important plague pilgrimages in the country.
In 1764, the master builder Michael Ehmann from Stein began building a new church. The presbytery of the previous building was preserved as the "original chapel". The frescoes were painted by Josef Ritter von Mölk, and the altars were also simply painted.
In 1782, the Viennese organ builder Stefan Helmich built the rococo organ. Under Emperor Joseph II, pilgrimage was severely restricted and Langegg became an independent parish.
In 1974, the Servites withdrew from Maria Langegg. The Community of the Beatitudes currently looks after the pilgrimage. Maria Langegg became an independent parish in 1783 as part of the Josephine parish regulation, with the monastery church being elevated to parish church status.
