1267
Treaty of Viterbo
Treaty · Europe
On this day
349 events in the atlas are dated to 27 May, from 669 BCE to 2026. The best known come first; below them is every one, age by age, the most significant first.
1267
Treaty · Europe
1644
Battle · East Asia
1873
Event · Europe
1960
Political · Middle East
1964
Rebellion · South America
2022
Event
Each event is listed under the date its sources give, as its page shows it. Before 1582, and in some countries later (Britain until 1752, Russia until 1918), that is a date of the Julian calendar, as on Wikipedia’s pages for each day.