The city lies in a hilly region on the route from Anzali to Tehran. The region was once a limit of Soviet infiltration into Iran. On March 24, 1943, Soviet authorities agreed to establish British and Polish bases of evacuation in Qazvin, among other locations. Hundreds of Polish civilian refugees arrived there, including children.

Polish plot with tombs of 40 Polish refugees (29 civilians and 11 soldiers) was organized in 1942 in Catholic-Chaldean Cemetery, being the property of religious community in Qazvin. Polish graves are located close to each other in the first segment at the entrance of the cemetery.

When Polish citizens left Qazvin, the Polish Plot remained completely unattended-to. According to the cataloguing of 1993, it was an empty ground with barely visible online of the grave shapes, having no durable tombstones. The reason of this condition was the fact that the graves were never refurbished and in 1955, the employees of the legation of Polis People’s Republic refused to share the costs of fencing and repair works with the owners of the cemetery. Close to the Polish Plot were the British Plot and a monument in remembrance of death of some Soviet soldiers.