According to investigations by Anneliese Schnell (Maurice Loewy and the equatorial Coudé in Vienna, Astronomische Nachrichten, Vol. 330, Issue 6, p. 552-554 [1]), he was born in Vienna, because this city is, e.g., given in a French translation of his birth certificate. Vienna as his birthplace is also given in the obituaries, in most of the large encyclopedias, and in other sources. Some sources indicate, obviously wrongly, Pressburg or Marienbad as his place of birth.
