What happened on 27 December?

5 events from the Ever-When timeline, ranked by how much they mattered.

1. 537 Hagia Sophia completed Justinian's domed basilica in Constantinople; the largest interior space in the world for nearly a thousand years.
2. 1571 Born: Johannes Kepler German astronomer whose three laws describe planetary motion.
3. 2007 Assassination of Benazir Bhutto The former Pakistani prime minister and first woman to lead a Muslim-majority state is killed campaigning in Rawalpindi.
4. 2008 Gaza War (2008-2009) Israel's three-week offensive against Hamas in the Gaza Strip ('Operation Cast Lead'), causing heavy Palestinian casualties.
5. 1979 Operation Storm-333 Soviet special forces storm the presidential palace in Kabul and install a client government.