The 1876–1877 Constantinople Conference (or ‘Shipyard Palace Conference’, from the conference venue) of the Great Powers (Britain, Russia, France, Germany, Austria-Hungary and Italy) was held in Istanbul (Constantinople) from 23 December 1876 until 20 January 1877. Following the Herzegovinian Rebellion started in 1875 and the Bulgarian Uprising in April 1876, the Great Powers agreed on a project for political reforms both in Bosnia and in the Ottoman territories with a majority Bulgarian population.