Franz Plazid de Schumacher im Himmelrich
From Infogalactic: the planetary knowledge core
Franz Plazid de Schumacher im Himmelrich (27 November 1725 – 18 April 1793), was a Swiss representative of the educated Ancien Régime. He was a councilor and officer, worked as a scientist and architect and is considered a pioneer in aviation. He was acquainted with Franz Ludwig Pfyffer von Wyher and Charles François Exchaquet, in whose family his granddaughter married.