The Bagri Foundation, the London-based organisation best known for promoting Asian culture, has branched into exhibitions with its first London show. You Who Sing Into Existence opened last weekend at St Cyprian's, a hidden Gothic church in Marylebone just a 15-minute walk from Frieze London, and marks the debut UK exhibition of the Mongolian artist Nomin Zezegmaa.

The centrepiece is a monumental 27-metre indigo batik hung from the church ceiling and traversing the nave. Originally inspired by the artist's residency in Indonesia earlier this year, the vast cloth is flanked by floating copper sculptures and silk rugs on which visitors can lie down and listen to a traditional Mongolian Long Song sound work filling the space. "I still cannot believe we managed to hang a 27-metre batik from the ceiling of this hidden London Gothic church," says the foundation's director Chelsea Pettitt, who has also curated the show. Zezegmaa says she wanted the works to be subtle interventions rather than competing with the ornate architecture.

Born in Germany but based in Ulaanbaatar, Zezegmaa draws on Mongol cosmology, landscapes and ancestral memory. The blue that dominates the installation is a recurring motif in her practice and a colour of deep significance in Mongolian tradition, evoking the eternal sky over the steppe.

The show is the first under the foundation's new Springboard curatorial programme, and it runs until 24 October, deliberately overlapping with Frieze week to catch the art world's attention. For a foundation expanding from funding into exhibition-making, a church filled with indigo cloth and song is an ambitious way to announce the new direction.