The 1876–77 Constantinople Conference of the Great Powers was held in Constantinople from 23 December 1876 until 20 January 1877. Following the beginning of the Herzegovinian Uprising in 1875 and the April Uprising in April 1876, the Great Powers agreed on a project for political reforms in Bosnia and in the Ottoman territories with a majority-Bulgarian population. The Ottoman Empire refused the proposed reforms, leading to the Russo-Turkish War a few months later.