Christianity in Iran dates back to antiquity, possibly as early as the 300 CE. The presence of many churches around the country is a testament to the longstanding and widespread presence of the faith. Many Iranian Christians belong the Armenian or Assyrian traditions, however the country is home to a wide range of denominations including Chaldeans, Catholics, Presbyterians, Pentecostals, Jama ’at e-Rabbani and Anglicans. Although the Iranian Constitution considers Christianity as a lawful and nationally recognized religion, it is illegal to convert out of Islam, hold official Christian prayer services or to distribute Christian literature in Persian. Despite the restrictions, quiet conversions to Christianity are common. As a safety measure, many Christians, especially converts, worship in secret underground churches located in private homes.