The International Library of Women Composers is a public institution based in the Nicolaihaus in Unna. It aims to promote awareness of women in music. The institution collects and archives works of female composers under the sponsorship of Sybil-Westendorp-Foundation. The Foundation is built on the heritage of the German composer Lotte Orthmann, better known by her artist's name Sybil Westendorp. Our archive includes music composed by women from all centuries including contemporary compositions. The concert-series "Komponistinnen-Konzerte" provides a platform to female artists to perform music by female composers. The concert-series "Komponistinnen-Konzerte" is realized by the cultural office of the city of Unna with the friendly assistance of Sybil-Westendorp-Stiftung and the cultural foundation of Sparkasse UnnaKamen.