Death of Berek Joselewicz. Fig. H. Pillati. Dow Baer (Berek) Joselewicz (b. September 17, 1764 in Kretynga, d. 5 or 8 May 1809 Kock) - Polish Jewish merchant, colonel of the Polish army, an officer of the Polish Legions in Italy. In the Duchy of Warsaw army commanded a squadron. He was killed during clashes with the Austrians at Kock in 1809, today his grave is a monument and tourist attraction.