 Complete the following phrase:  Born in Czerniki, Ostpreußen, as Sohn eines evangelischen Pfarrers studierte Thomaschek an der Albertus-Universität Königsberg Theologie und Philologie. 1846 wurde er Mitglied der . Won for singing by Eduard Mantius in 1847, he was trained by Franz Hauser in Munich. He had his first stage appearance in 1849 in Danzig in the . It followed annually changing engagements: Hoftheater Sondershausen 184950, Mainfranken Theater Würzburg. 185051, Barfüsserkloster Zurich 185152, Volkstheater Rostock 185253, Staatstheater Kassel 185354, Deutsche Oper Amsterdam 185455, 185556 and Szczecin City Theatre 185657. With a Wanderbühne, he was in Lausanne and Chambéry in 185758. Then he found firm engagements in Theater Lübeck. 185859, at the Staatstheater Nürnberg, at the Salzburger Landestheater 186162 and at the Theater Basel 186263. After he had worked in 186465 at Stralsund Theatre had been a singer and director, he went even further north in 186566, to the new German Latvian National Opera. After one year at the , he went to the Theater Trier as singer and director 186768, the Landestheater Detmold 186869, the Theater Chemnitz 186970 and the Grand Theatre, Poznań 187071. After the 