Bydgoszcz (; ; Latin: Bydgostia) is a city in northern Poland, on the Brda and Vistula rivers, with a population of 369,151 (2004).
Bydgoszcz was occupied by the Teutonic Knights from 1331-1337, and was recovered by King Casimir III, who granted the city municipal rights on 19 April 1346.
Bydgoszcz followed the history of Greater Poland until 1772, when it was annexed by the Kingdom of Prussia in the First Partition of Poland.
The Extermination Camp at Treblinka in which hundreds of thousands of Jews were murdered is situated near the village of Wolka-Okraglik, in the commune of Kosow, district of Sokolow Podlaski, province (voivodship) of Warsaw.
At a short distance, along the north-western and northern boundaries of the camp, the road from Kosow to Malkinia and the railway from Siedlce to Malkinia run parallel, but owing to the undulating, wooded character of the region, the grounds of the camp are invisible alike from the road and from the railway.
Near the south-western edge of the camp a branch line runs to a gravel pit and was continued to the camp itself.