- 537 27 Dec The Hagia Sophia, one of the world's greatest architectural masterpieces, is dedicated in Constantinople.
- 1831 27 Dec Charles Darwin departs England on a voyage that leads to his formulation of the theory of evolution.
- 1945 27 Dec The World Bank, created to promote economic development and eliminate poverty, comes into existence.
World War One Centenary
- Find out more about how the BBC is covering the World War One Centenary, and see the latest programmes and online content
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