The church can be visited
St. Bartholomäus Church

The Parish Church of St. Bartholomew in Greßthal is a historic sacred building in Bavaria. Originally founded as a proprietary church of the Counts of Schweinfurt, it developed into a religious center in the region.
History+
Christianization in Greßthal began around the year 600 with the erection of a cross at a former pagan cult site. In 680, the first church was consecrated, dedicated to Saint Matthias. The Counts of Schweinfurt founded a parish in the 8th century with parish property, which was of regional importance. From 804, Greßthal belonged to the Fulda Monastery, whose abbots expanded the parish church into a fortified church in the 12th century, though its fortifications were later removed. After disputes, the church came into the possession of the Prince-Bishopric of Würzburg in 1376. In 1443, Bishop Gottfried IV Schenk von Limpurg elevated Greßthal to an episcopal arch-parish. The first arch-parish priest, Eberhard von Grumbach, renovated the church and introduced Saint Bartholomew as the new patron saint.
Source: Wikipedia · Licence: CC BY-SA 4.0
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: 50.0757, 10.0370