On This Day: March 28th

Heinrich Wilhelm Matthäus Olbers discovers 2 Pallas, the second asteroid ever to be discovered.

Treaty of Florence is signed, ending the war between the French Republic and the Kingdom of Naples.

Partitions of Poland: The Duchy of Courland and Semigallia, a northern fief of the Polish-Lithuanian Commonwealth, ceases to exist and becomes part of Imperial Russia.

Juan Bautista de Anza finds the site for the Presidio of San Francisco.

War of the Austrian Succession: In the Battle of Vilshofen, Austrian forces defeat French forces.

The foundation stone of Valletta, Malta's capital city, is laid by Jean Parisot de Valette, Grand Master of the Sovereign Military Order of Malta.

The Great German Pilgrimage, which had been under attack by Bedouin bandits for three days, is rescued by the Fatimid governor of Ramla.

Roman Emperor Valentinian I appoints his brother Flavius Valens co-emperor.

After assassinating the Roman Emperor Pertinax, his Praetorian Guards auction off the throne to Didius Julianus.

Roman emperor Caligula accepts the titles of the Principate, bestowed on him by the Senate.