Past
History
Events and turning points from the past, the myths that grew around them, and the dates that put them in order.
Fact files
All topics ›London Bridge
1831
Year Rennie's bridge opened
The Gregorian calendar
10 days
Dropped in October 1582 in the countries that switched first
The Pantheon
43 metres
Approximate interior diameter of the dome
Cleopatra VII
51 to 30 BCE
Years of her reign
The Middle Ages
1347 to 1351
Years the Black Death swept the Middle East and Europe
World population history
117 billion
People ever born, by one demographic estimate