Founder of Rapp Motorenwerke GmbH, which would later turn into iconic car company BMW after his death.
He worked for the car company Daimler-Benz before founding Rapp Motorenwerke GmbH.
He ran an observatory in Switzerland that was dedicated to solar research.
He was close friends with Julius Auspitzer with whom he started the Rapp Motorenwerke GmbH company.
He and Ferdinand Porsche both contributed greatly to the look of automobiles.