[Dr. John Rittmeister - neurologist and resistance fighter].

He was born in Hamburg on 21st August 1898 and beheaded in the Plötzensee penitentiary on 13th May 1943. Our colleague was a personality combining professional striving and political commitment into a dialectic unity. The more important biographic data are given, the co-operation in the Schulze-Boysen-Harnack organisation is described as far as it has become known, and Rittmeister's scientific works are mentioned.