Sumerians, and the paper by Austrian linguist Dr. Hermann F. Kvergić of Vienna titled "La psychologie de quelques éléments des langues Turques" ("the psychology of some elements of the Turkic Languages"). Atatürk formally introduced the Sun Language Theory into Turkish political and educational circles in 1935, although he did later correct the more extremist practices. Saffet Arıkan, a politician who was the head of the Turkish Language Association, said "Ulu Önderimiz Ata Türk Mustafa Kemal" ("Our Great Leader Ata Türk Mustafa Kemal") in the opening speech of the 2nd Language Day on 26 September 1934. Later, the surname "Atatürk" ("father of the Turks") was accepted as the surname of Mustafa Kemal after the adoption of the Surname Law in 1934. Beginning in 1932, several hundred "People's Houses" (Halkevleri) and "People's Rooms" (Halkodaları) across the country allowed greater access to a wide variety of artistic activities, sports, and other cultural events. Atatürk supported and encouraged the visual and the plastic arts, which had been suppressed by Ottoman leaders, who regarded depiction of the human form as idolatry. Many museums opened, architecture began to follow modern trends, and classical Western music, opera, ballet, and theatre took greater hold in the country. Book and magazine publications increased as well, and the film industry began to grow. Almost all Qur'ans in Turkey before the 1930s were printed in Old Arabic. However, in 1924, three Turkish translations of the Qur'an were published in Istanbul, and several renderings of the Qur'an in the Turkish language were read in front of the public, creating significant controversy. These Turkish Qur'ans were fiercely opposed by members of the religious community, and the incident impelled many leading Muslim modernists to call upon the Turkish Parliament to sponsor a Qur'an translation of suitable quality. With the support of Atatürk, the Parliament approved the project and the Directorate of Religious Affairs appointed Mehmet Akif (Ersoy) to compose a Qur'an translation, and the Islamic scholar Elmalılı Hamdi Yazır to author a Turkish language Qur'anic commentary (tafsir) titled Hak Dini Kur'an Dili (The Qur'an: the Tongue of the Religion of Truth). However, it was only in 1935 that the version of Yazır's work read in public found its way to print. In 1932, Atatürk justified the translation of the Qur'an by stating how he wanted to "teach religion in Turkish to Turkish people who had been practising Islam without understanding it for centuries." Atatürk