In 1547, Ottomans built coastal fortress of Gonia, an important Ottoman outpost in southwestern Georgia, which served as capital of Lazistan; then Batum until it was acquired according to the Congress of Berlin by the Russians in 1878, throughout the Russo-Turkish War, thereafter, Rize became the capital of the sanjak. The Muslim Lazs living in newly established Batumi Oblast were subjected to ethnic cleansing; by 1882, approximately 40,000 Lazs had settled in the Ottoman Empire, especially to provinces in Western Anatolia such as Bursa, Yalova, Karamursel, Izmit, Adapazarı and Sapanca. With the spread of Young Turk movement in Lazistan, the short-lived autonomist national movement headed by Faik Efendişi was established. However, it was soon eliminated as the result of Abdul Hamid's intervention.