1260 The spectacular Cathedral of Chartres is dedicated in the presence of King Louis IX of France; the cathedral is now a UNESCO World Heritage Site.
1945 UNESCO is founded.
1952 In Dhaka, East Pakistan (present Bangladesh) police open fire on a procession of students that was demanding the establishment of Bengali as the official language, killing four people and starting a country-wide protest which led to the recognition of Bengali as one of the national languages of Pakistan. The day is later declared as "International Mother Language Day" by UNESCO.
1986 The Seville Statement on Violence is adopted by an international meeting of scientists, convened by the Spanish National Commission for UNESCO, in Seville, Spain.
1989 UNESCO adopts the Seville Statement on Violence at the twenty-fifth session of its General Conference.