only with Greek (s > h). Graeco-Aryan has comparatively wide support among Indo-Europeanists who believe the Indo-European homeland to be located in the Armenian Highlands, the "Armenian hypothesis". Early and strong evidence was given by Euler's 1979 examination on shared features in Greek and Sanskrit nominal flection. Used in tandem with the Graeco-Armenian hypothesis, the Armenian language would also be included under the label Aryano-Greco-Armenic, splitting into Proto-Greek/Phrygian and "Armeno-Aryan" (ancestor of Armenian and Indo-Iranian). Evolution Classical Armenian (Arm: grabar), attested from the 5th century to the 19th century as the literary standard (up to the 11th century also as a spoken language with different varieties), was partially superseded by Middle Armenian, attested from the 12th century to the 18th century. Specialized literature prefers "Old Armenian" for grabar as a whole, and designates as "Classical" the language used in the 5th century literature, "Post-Classical" from the late 5th to 8th centuries, and "Late Grabar" that of the period covering the 8th to 11th centuries. Later, it was used mainly in religious and specialized literature, with the exception of a revival during the early modern period, when attempts were made to establish it as the language of a literary renaissance, with neoclassical inclinations, through the creation and dissemination of literature in varied genres, especially by the Mekhitarists. The first Armenian periodical, Azdarar, was published in grabar in 1794. The classical form borrowed numerous words from Middle Iranian languages, primarily Parthian, and contains smaller inventories of loanwords from Greek, Syriac, Aramaic, Arabic, Mongol, Persian, and indigenous languages such as Urartian. An effort to modernize the language in Bagratid Armenia and the Armenian Kingdom of Cilicia (11–14th centuries) resulted in the addition of two more characters to the alphabet ("" and ""), bringing the total number to 38. The Book of Lamentations by Gregory of Narek (951–1003) is an example of the development of a literature and writing style of Old Armenian by the 10th century. In addition to elevating the literary style and vocabulary of the Armenian language by adding well above a thousand new words, through his other hymns and poems Gregory paved the way for his successors to include secular themes and vernacular language in their writings. The thematic shift from mainly religious texts to writings with secular outlooks further enhanced and enriched the vocabulary. “A Word of Wisdom”, a poem by Hovhannes Sargavak devoted to a starling, legitimizes poetry