Frohberg Castle (Ruin)

The Frohberg fortress was first documented in 1292 with the mention of Konrad I. Schaler "de Vroberg". It is presumed that the castle was founded by the Schaler family in the second half of the 13th century. Although it controlled the Plattenpass between Birseck and Laufental, its proximity to other castles suggests that its construction was more likely due to power struggles between the Schaler and Münch families rather than the collection of road tolls. There is speculation that the castle may never have been fully completed. Carl Roth suggests that Frohberg was damaged during the Basel earthquake of 1356 and not rebuilt afterwards. In the 14th century, the remains passed as an episcopal fief to the Counts of Thierstein-Pfeffingen, who were interested in the associated estates and rights and integrated Frohberg into the Pfeffingen dominion.