Belarus was once a major center of European Jews, with 10% of the population being Jewish. But since the mid-20th century, the number of Jews has been reduced by the Holocaust, deportation, and emigration, so that today it is a very small minority of less than one percent. The Lipka Tatars, numbering over 15,000, are predominantly Muslims. According to Article 16 of the Constitution, Belarus has no official religion. While the freedom of worship is granted in the same article, religious organizations deemed harmful to the government or social order can be prohibited.