Avesta word for "praise-song" (Bartholomae: "Lobgesang"); that word is not actually attested in any text. The surviving texts of the Avesta, as they exist today, derive from a single master copy produced by Sasanian Empire-era (224–651 CE) collation and recension. That master copy, now lost, is known as the 'Sassanian archetype'. The oldest surviving manuscript ("K1") of an Avestan language text is dated 1323 CE. Summaries of the various Avesta texts found in the 9th/10th century texts of Zoroastrian tradition suggest that a significant portion of the literature in the Avestan language has been lost. Only about one-quarter of the Avestan
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