On this day: 19/01/379
Emperor Gratian elevates Flavius Theodosius at Sirmium to Augustus, and gives him authority over all the eastern provinces of the Roman Empire.
On this day: 19/01/649
Conquest of Kucha: The forces of Kucha surrender after a forty-day siege led by Tang dynasty general Ashina She'er, establishing Tang control over the northern Tarim Basin in Xinjiang.
On this day: 19/01/1419
Hundred Years' War: Rouen surrenders to Henry V of England, completing his reconquest of Normandy.
On this day: 19/01/1511
The Italian Duchy of Mirandola surrenders to the Pope.
On this day: 19/01/1520
Sten Sture the Younger, the Regent of Sweden, is mortally wounded at the Battle of Bogesund and dies on February 3.
On this day: 19/01/1607
San Agustin Church in Manila is officially completed; it is the oldest church still standing in the Philippines.
On this day: 19/01/1639
Hämeenlinna (Swedish: Tavastehus) was granted privileges after it separated from the Vanaja parish as its own city in Tavastia.
On this day: 19/01/1764
John Wilkes is expelled from the British House of Commons for seditious libel.
On this day: 19/01/1764
Bolle Willum Luxdorph records in his diary that a mail bomb, possibly the world's first, has severely injured the Danish Colonel Poulsen, residing at Børglum Abbey.
On this day: 19/01/1788
The second group of ships of the First Fleet arrive at Botany Bay.