Richard A. Herman, 100, a philanthropist who donated to Washington organizations that included the National Symphony Orchestra, the Washington National Opera, the Kennedy Center, the Corcoran Gallery of Art and the social service organization Family Matters, died Nov. 13 at his home in Washington.

He had complications from dementia, said his cousin Betsy Paull.

Mr. Herman was described by the organizations he supported as a longtime and generous donor. The National Symphony Orchestra will hold a concert at the Kennedy Center in his honor in December.

Richard Albert Herman was a Washington native and an architecture graduate of the University of Pennsylvania. During World War II, he worked for the War Department as an architect. His father, Bernard Herman, was chief engineer of the Southern Railway system.

Mr. Herman had no immediate survivors.

— Emily Langer