Ancient Iranian religion was strongly connected. Beginning in the early 10th-century BC, the ancient Iranian religion was gradually displaced by Zoroastrianism, which contains many essential aspects of its predecessor. The sources on ancient Iranian religion, though limited, consist of textual and material sources. The textual sources are both Iranian and non-Iranian. An important Iranian source is the Avesta, which are Zoroastrian sacred scriptures made in the Avestan. This is considered the principal source of knowledge on ancient Iranian religions. It is a collection of several texts that seems to have been over a large span of time by a variety of authors. These
Religion in Turkmenistan adherents in each locality for registration and no Bahá'í community in Turkmenistan could meet this requirement. As of 2007 the religion had still failed to reach the minimum number of adherents to register and individuals have seen their homes raided for Bahá'í literature. Freedom of religion is guaranteed by article 11 of the Constitution of Turkmenistan. However, like other human rights, in practice it does not exist. Former President Saparmurat Niyazov's book of spiritual writings, the "Ruhnama", is imposed on all religious communities. According to Forum 18, despite international pressure, the authorities severely repress all religious groups, and the legal