Stalag I-B Hohenstein was a German World War II prisoner-of-war camp located 2 kilometres (1.2 mi) west of Hohenstein, East Prussia (now Olsztynek, Poland).

[1] The camp was partially located on the grounds of the Tannenberg Memorial and initially included a set of wooden structures intended to house World War I veterans during German Nazi festivities.

Harsh conditions, malnutrition, maltreatment and recurring typhoid epidemics led to many deaths among the prisoners.

Between 50[3] and 55 thousand of them were buried in 500 mass graves at the Sudwa cemetery located nearby.

Since 1980 the Olsztynek-based municipal museum hosts a small exhibition devoted to the camp and its inmates.