Wilhermsdorf was first mentioned in a document in 1096, at that time it was still written Wilhelmsdorf after the nobles of Wilhelmsdorf who lived here in a fortress (from 1568 Wilhermsdorf after a change of ownership).
Unique in Franconia: The Catholic-Baroque castle church with its
magnificent facade was designed for the Protestant rite.
The old hospital and the hospital church were also built at the beginning of the 18th century.
Under the rule of Countess Franziska Barbara von Hohenlohe, the town experienced a great upswing. The "benefactor of Wilhermsdorf", as she is still called today, had old houses demolished and new ones built, she had streets paved and the magnificent castle church built between 1706 and 1714. She died in 1718 at the age of 52 and lies in state in a magnificent coffin in the church's basement crypt.
The last feudal rent administrator and magistrate before the "Bayerische
interrogation" in 1839 was Christian Eberhard Wunder,
whose son succeeded in discovering soda cellulose, i.e. des
first paper made from pure wood. In addition, he discovered
two new varieties of ultramarine red. The latter discovery was protected with the registration on July 2, 1877 with the German Reich Patent No. 1. He made many other inventions and was a
famous mountaineer.