The Friends were founded over 30 years ago to enable interested people in South Tyrol and beyond to participate in the preservation and cultural use of the cultural monument of Prösels Castle.

Over 400 people in South Tyrol and beyond have used this opportunity to join the Friends.

To be admitted to the Friends a prospective member has to either make a suitable financial donation or a donation in kind. The option of a donation in kind, also in the form of personal efforts at events, is intended for those whose financial situation does not permit a donation of cash. No-one, whether well off or not, shall be excluded from joining the Friends.

Admission to the Friends follows an appropriate donation. The new member receives an admissions certificate.

In return the cooperation undertakes to use the donations of the Friends for the conservation and cultural use of Prösels Castle in a meaningful manner and to inform the Friends annually about the use of their donations and about future plans. This generally takes place at the Tyrolean Castle Festival on Prösels Castle on the first Saturday of July.