Pul-e-Charkhi (Persian: زندان پل چرخی), also known as Pul-i-Charkhi or Afghan National Detention Facility, is the largest prison in Afghanistan east of Kabul. Construction of the jail began in the 1970s by order of former president Mohammed Daoud Khan and was completed during the 1980s. The prison became notorious for torture and executions after the 1978 Saur Revolution as well as during the 10 year Soviet war that followed. Between April 1978 and the Soviet invasion of December 1979, the communist People's Democratic Party of Afghanistan (PDPA) under Nur Muhammad Taraki, executed around 27,000 political prisoners at Pul-i-Charki.