April–June April 11 – Following the death of its last count, the Palatinate-Landsberg passes to the King of Sweden. May 15 – The Canal du Midi in France is opened officially, as the Canal Royal de Languedoc. June 23 – The Church of the East, an Eastern Orthodox rite in Mesopotamia (now Iraq), already split between two patriarchs in the Eliya line and the Shimun line, is split along a third line by the Roman Catholic Church when Mar Yousip of the Archdiocese of Amid (now Diyarbakır in Turkey) is proclaimed by Pope Innocent XI as Joseph I, "Patriarch of the Chaldean nation deprived of its patriarch", creating the "Josephite line" of the Chaldean Catholic Church.
April–June April 11 – Following the death of its last count the Palatinate-Landsberg passes to the King of Sweden May 15 – The Canal du Midi in France is opened officially as the Canal Royal de Languedoc June 23 – The Church of the East an Eastern Orthodox rite in Mesopotamia (now Iraq) already split between two patriarchs in the Eliya line and the Shimun line is split along a third line by the Roman Catholic Church when Mar Yousip of the Archdiocese of Amid (now Diyarbakır in Turkey) is proclaimed by Pope Innocent XI as Joseph I "Patriarch of the Chaldean nation deprived of its patriarch" creating the "Josephite line" of the Chaldean Catholic Church