In the course of the 20th century, the Grand Hotel Toblach experienced highs and lows, changing ownership multiple times and serving various purposes. During World War I, it was even converted into a field hospital. In the time of the Great Depression, bankruptcy followed, and the hotel frequently changed hands. It hosted various organizations, including the umbrella organization of the fascist party and later the cartographic and geographic service of the Italian army. For a while, it also served as a recreational facility for needy children. In 1991, the South Tyrolean regional government began renovation work to transform this historic building into a modern cultural and convention center. Since 1999, the Grand Hotel Toblach has not only housed the Gustav Mahler Hall but also a youth hostel, a top-class restaurant, the Three Peaks Nature Park Visitor Center, the local music school, the youth service for the Hochpustertal region, a continuing education center, social housing, and a holiday home. The building has evolved into a hub for culture and education, hosting both local and regional events. Significant cultural events take place here every year, including the Gustav Mahler Music Weeks, the South Tyrol Festival, and the Toblach Talks. Thus, the Gustav Mahler Hall at the Grand Hotel Toblach is not only a space with impressive acoustics but also a place that reflects the rich history and cultural diversity of this region.