In October 1961 she co-founded .
In October 1961 she joined the interdenominational choir at Berlin 's ( Protestant ) Cathedral , which now flourished under the musical direction of a man called Herbert Hildebrand .
In October 1961 she co-founded and joined the interdenominational choir at Berlin 's ( Protestant ) Cathedral , which now flourished under the musical direction of a man called Herbert Hildebrand .