Analysis of information sources in references of the Wikipedia article "Pyongyang" in English language version.
It's hard to say how many covert Christians the North has; estimates range from the low tens of thousands to 100,000. Christianity came to the peninsula in the late 19th century. Pyongyang, in fact, was once known as the 'Jerusalem of the East.'
By the early 1940s Pyongyang was by far the most Protestant of all major cities of Korea, with some 25–30% of its adult population being church-going Christians. In missionary circles this earned the city the nickname "Jerusalem of the East".
It's hard to say how many covert Christians the North has; estimates range from the low tens of thousands to 100,000. Christianity came to the peninsula in the late 19th century. Pyongyang, in fact, was once known as the 'Jerusalem of the East.'
