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Stahlberg Stiftung

A Hamburg-based private foundation founded in 2002 that promotes culture and youth through the M@S Musical at School programme and the Kultur Gut Hasselburg estate.

Last updated September 29, 2026

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Overview

Stahlberg Stiftung is a private foundation (Stiftung bürgerlichen Rechts) based in Hamburg, Germany. It was founded in 2002 by Constantin Stahlberg and was officially recognised by the Hamburg foundation supervisory authority on 19 December 2002. Its stated focus is the promotion of culture and of young people. The foundation is a non-profit entity whose supervisory authority is the justice authority (Justizbehörde) of the Free and Hanseatic City of Hamburg, and it is registered at Eichheister 12 in the Harburg district of Hamburg. The foundation's work is concentrated in two main programme areas. The first is M@S, Musical at School, a project in which professional musical theatre practitioners work with school pupils over a single project week to rehearse and then publicly perform a musical. According to the foundation's own website, the format is summarised as "100 pupils – 5 days – 1 musical", with four musical professionals rehearsing together with the students during a school project week and a public performance at the end of the week. The programme has been run since 2007 in Hamburg and other locations including Kiel, Lübeck and Munich, as well as at the KinderKulturFestival in North Rhine-Westphalia, and it targets socially disadvantaged young people in and around Hamburg. Applications for project weeks in 2026 and 2027 are invited by the foundation. The second major area is Kultur Gut Hasselburg, a historic estate near Neustadt in Holstein in Schleswig-Holstein. The Stahlberg Stiftung acquired the estate in 2010; the estate had first been documented in the 14th century. After renovation, performances resumed in the thatched barn (Reetscheune) in 2013. The Kulturkreis Hasselburg also operates in the manor house (Herrenhaus). Music events are held in the Baroque hall of the manor house and in the large thatched concert barn, including events within the Schleswig-Holstein Musik Festival. In 2010 the foundation received the Hamburgischer Stifterpreis, a prize awarded every two years by the Hamburg Senate and the Gesellschaft Harmonie von 1789 e.V. for outstanding foundation work for the benefit of the city. The foundation is represented by its board, chaired by Dr. Constantin Stahlberg, and it accepts donations, which are tax-deductible in Germany. It is a small, privately funded cultural and youth organisation rather than a commercial enterprise, and it operates primarily in northern Germany.

History

The Stahlberg Stiftung was founded in 2002 by Constantin Stahlberg and was recognised by the Hamburg foundation supervisory authority on 19 December 2002. It is a private foundation under civil law (Stiftung bürgerlichen Rechts) with its seat in Hamburg, and its supervisory authority is the justice authority of the Free and Hanseatic City of Hamburg. Its stated purpose is the promotion of culture and of young people. One of its central programmes, M@S, Musical at School, has been run since 2007. In this format, professional musical theatre practitioners work with school pupils during a project week to rehearse a musical that is then publicly performed at the end of the week. The foundation describes the concept as "100 pupils – 5 days – 1 musical". Projects have taken place in Hamburg, Kiel, Lübeck and Munich, as well as at the KinderKulturFestival in North Rhine-Westphalia, and they are aimed particularly at socially disadvantaged young people in and around Hamburg. The foundation continues to invite applications for project weeks, including for 2026 and 2027. In 2010 the foundation acquired Kultur Gut Hasselburg, a historic estate near Neustadt in Holstein in Schleswig-Holstein that had first been mentioned in documents in the 14th century. After renovation, performances resumed in the thatched barn (Reetscheune) in 2013. The Kulturkreis Hasselburg also operates in the manor house. Music events take place in the Baroque hall of the manor house and in the large thatched concert barn, including events within the Schleswig-Holstein Musik Festival. Also in 2010, the foundation received the Hamburgischer Stifterpreis, awarded every two years by the Hamburg Senate and the Gesellschaft Harmonie von 1789 e.V. for outstanding foundation work for the benefit of the city. The foundation is represented by its board, chaired by Dr. Constantin Stahlberg, and it accepts tax-deductible donations in Germany.

  • 2013

    Performances resume in the renovated Reetscheune at Kultur Gut Hasselburg.

  • 2010

    Foundation acquires Kultur Gut Hasselburg; receives the Hamburgischer Stifterpreis.

  • 2007

    M@S, Musical at School programme begins, running projects in Hamburg and later other cities.

  • 2002

    Stahlberg Stiftung founded by Constantin Stahlberg; recognised by the Hamburg foundation supervisory authority on 19 December 2002.

Products and positioning

Non-profit private foundation promoting culture and youth, known for the M@S Musical at School programme and the Kultur Gut Hasselburg estate.

  • M@S, Musical at School

    One-week musical theatre projects for socially disadvantaged young people in and around Hamburg; since 2007 in Hamburg, Kiel, Lübeck, Munich and at the KinderKulturFestival in North Rhine-Westphalia.

  • Kultur Gut Hasselburg

    Historic estate near Neustadt/Holstein acquired in 2010; venue for music events including the Schleswig-Holstein Musik Festival, with performances in the Baroque hall and thatched concert barn.

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