Johannes "Hanns" Evangelist Hörbiger , born 29 November 1860, in Atzgersdorf, died 11 October 1931, in Mauer. Better known as Hanns Hörbiger, an Austrian engineer from Vienna with roots in Tyrol. He took part in the construction of the Budapest subway and in 1894 invented a new type of valve essential for compressors still in widespread use today. Also remembered today for his pseudoscientific Welteislehre ("World Ice doctrine") which holds that all heavenly bodies are made of ice.