Career
His full title was Franz de Paula Severin Wenzel Maria Philipp Benitius Graf Deym von Střítež. Deym was the son of a Field Marshal, and was a First Lieutenant in the Lancers. In 1864 he joined the Diplomatic Service.
He was first Attaché then Legationssekretär (Secretary) in Paris, before being sent to the Embassy in Rome.
In 1871 he became the Special Ambassador and Acting Minister for the armed services, and then retired from public life. On 18 October 1888 he became Ambassador to London, a position he held until his death.