Hans Poelzig

I.G. Farben Building Groes Schauspielhaus

Poelzig was born in Berlin in 1869 to Countess Clara Henrietta Maria Poelzig while she was married to George Acland Ames, an Englishman. Uncertain of his paternity, Ames refused to acknowledge Hans as his son and consequently he was brought up by a local choirmaster and his wife. In 1899 he married Maria Voss with whom they had four children.

Source: Wikipedia