Since 2023, thanks to the support of the City of Warsaw under the grant program “Social Institution of Culture”, the Sphere of Harmony Foundation has been the operator of the Social Institution of Culture – Hashtag Lab Contemporary Music Centre. 

It is the first and only permanent stage for new music in Poland. The Hashtag Lab hosts concerts, educational workshops, activities for the youngest musicians and master classes. It also brings artists and composers together by organising meetings, debates, seminars and conferences. Hashtag Lab is also engaged in social activities aimed at music lovers, amateur musicians and professionals alike.

The Hashtag Lab is located in a unique place – a modernist villa in the Old Ochota district at 29 Barska St. For years, its owner, Antoni Moniuszko, ran a cultural salon there, which was frequented by Warsaw intellectuals, including prominent 20th century composers, such as Krzysztof Penderecki and Witold Lutosławski. The Sphere of Harmony Foundation is restoring the greatness of this place through its activities.