Star architect Mario Botta is restoring the castle. The aim is for it to become a place where the past and the future meet, a place of creative exchange and inspiration. It is to become an initial platform for learning, art, tourism, leisure, meeting others, the exchange of information and communication.

The Bishops' Castle, with its glass dome designed by Mario Botta, sits in splendour on a hill above the valley floor. The first written mention of the castle is in a document dating back to 1254. It was used at that time as the residence of the steward of the estate. Along with the neighbouring court tower (Turm des Viztums), it sustained serious damage in 1415 during the "Raron Troubles". It was not until 60 years later that the complex was converted into a summer residence. Later, the castle served as a meeting place for the Valais cantonal parliament. It was here that the trial in 1627 of the rebel captain Anton Stockalper took place and was also the scene of many witch trials in the 17^th century, representing the sad milestones in its history. The Bishops' Castle belongs to the municipality of Leuk and has been a listed building since 1934.

The Leuk Castle Foundation was established in 1999 with the aim of renovating the Bishops' Castle and holding cultural events in and around the castle. The foundation has been very active in the last few years. Its activities include the establishment of the Spycher Prize for Literature and the building of a cabaret theatre.