The New School Archives staff created the Mannes College of Music administrative records collection by integrating several collections documenting the Mannes College of Music (now, Mannes School of Music). The collection includes correspondence, event flyers, photographs, legal records, meeting minutes, illustrations, administrative records and reports.

Miriam Kartch (1924-) was a longtime faculty member of Mannes School of Music, starting under Clara Damrosch Mannes in 1945 and retiring in 2015. This collection consists of administrative documents and notes from Kartch’s tenure at Mannes, most dating from the 1970s to 1990s.