4 October 1926, Islamic courts were closed. Establishing the civic law needed time, so Atatürk delayed the inclusion of the principle of laïcité (the constitutional principle of secularism in France) until 5 February 1937. In keeping with the Islamic practice of sex segregation, Ottoman practice discouraged social interaction between men and women. Atatürk began developing social reforms to address this issue very early, as was evident in his personal journal. He and his staff discussed issues such as abolishing the veiling of women and integrating women into the outside world. His plans to surmount the task were written in his journal in November 1915: Atatürk needed a new civil code to establish his second major step of giving freedom to women. The first part was the education of girls, a feat established with the unification of education. On 4 October 1926, the new Turkish civil code, modelled after the Swiss Civil Code, was passed. Under the new code, women gained equality with men in such matters as inheritance and divorce, since Atatürk did not consider gender a factor in social organization. According to his view, society marched towards its goal with men and women united. He believed that it was scientifically impossible for Turkey to achieve progress and become civilized if Ottoman gender separation persisted. During a meeting he declaimed: In 1927, the State Art and Sculpture Museum (Ankara Resim ve Heykel Müzesi) opened its doors. The museum highlighted sculpture, which was rarely practised in Turkey due to the Islamic tradition of avoiding idolatry. Atatürk believed that "culture is the foundation of the Turkish Republic," and described modern Turkey's ideological thrust as "a creation of patriotism blended with a lofty humanist ideal." He included both his own nation's creative legacy and what he saw as the admirable values of global civilization. The pre-Islamic culture of the Turks became the subject of extensive research, and particular emphasis was placed on the widespread Turkish culture before the Seljuk and Ottoman civilizations. He instigated study of Anatolian civilizations - Phrygians, Lydians, Sumerians, and Hittites. To attract public attention to past cultures, he personally named the banks "Sümerbank" (1932) after the Sumerians and "Etibank" (1935) after the Hittites. He also stressed the folk arts of the countryside as a wellspring of Turkish creativity. At the time, the republic used the Ottoman Turkish language written in the Arabic script with Arabic and Persian loan vocabulary.