The church can be visited
St. Bartholomew's Church

The pilgrimage chapel of St. Bartholomä is a structure on the western shore of Lake Königssee in Bavaria. Located on the Hirschau peninsula, it is only accessible by boat or via hiking trails.
History+
The origins of St. Bartholomä date back to the 12th century. A document from 1134 mentions a chapel named Basilica Chunigesee, consecrated at this site. In 1522, the chapel was granted the right to receive indulgences. Between 1697 and 1698, the previous structure was demolished and rebuilt in the Baroque style as a domed building. Further alterations took place in the 18th century under Prince-Provost Cajetan Anton Notthafft von Weißenstein. In the 19th century, King Ludwig II initiated the restoration of the chapel, which was re-consecrated on July 25, 1868. St. Bartholomä is also the destination of the annual Almer pilgrimage, one of Europe's oldest mountain pilgrimages, with traditions dating back to 1635.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://commons.wikimedia.org/wiki/File:2_of_10_-_Lake_Konigssee_Bavaria,_GERMANY.jpg?uselang=de
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 47.5447, 12.9725