Zen-Ruffinen Castle or Loretan also known as de Werra is a castle in the municipality of Leuk of the Canton of Valais in Switzerland. It is a Swiss heritage site of national significance.[1]
The complex consists of several buildings constructed over centuries. Zen-Ruffinen was built for the Zen-Ruffinen family in the 17th century. The center of the building and the stair tower were built in 1611–12. The Zen-Ruffinen family was a powerful patrician family which included two Bishops of Sion.[2] The complex was extended for Baron Ferdinand de Werra in the 19th century. The south-west corner of the de Werra extension includes an older wall from 1630.[3]