In the page's words:

On Sundays at 12 noon, the Förderverein Rittergut Orr e.V. organizes regular matinee events in the manor house. Admission to these events is free, but we are happy to receive a generous donation for the performing artists.
The aim of the matinee is to promote young talent and musicians from the region. This includes winners of "Jugend musiziert", music students as well as adult musicians and music groups who are looking for a forum for their music. In addition, professional musicians and music groups are also given the opportunity to introduce themselves to the audience and promote their program.