Treblinka was an extermination camp, built by Nazi Germany in occupied Poland during World War II. It was located near the village of Treblinka north-east of Warsaw in what is now the Masovian Voivodeship. The camp operated between 23 July 1942 and 19 October 1943 as part of Operation Reinhard, the most deadly phase of the Final Solution. During this time, it is estimated that between 700,000 and 900,000 Jews were killed in its gas chambers, along with 2,000 Romani people. More Jews were killed at Treblinka than at any other Nazi extermination camp apart from Auschwitz.