Korea.
Today, four state-sanctioned churches exist, which freedom of religion advocates say are showcases for foreigners. Official government statistics report that there are 10,000 Protestants and 4,000 Roman Catholics in North Korea.
According to a ranking published by Open Doors, an organization that supports persecuted Christians, North Korea is currently the country with the most severe persecution of Christians in the world. Open Doors estimates that 50,000–70,000 Christians are detained in North Korean prison camps. Human rights groups such as Amnesty International also have expressed concerns about religious persecution in North Korea
