Shapur I: Rise to Power in Sasanian Empire (+ 8 more historical events on this day!)

A Daily Dose of History: Events on this Day in History · Apr 12, 2026 · 6m

A Daily Dose of History (12 Apr 2026)

Today's historical events:

Shapur I becomes co-emperor of the Sasanian Empire with his father Ardashir I.

Anthemius is elevated to Emperor of the Western Roman Empire.

King Edwin of Northumbria is converted to Christianity by Paulinus, bishop of York.

Duke Oldřich of Bohemia deposes and blinds his brother Jaromír, who flees to Poland.

The Crusaders of the Fourth Crusade breach the walls of Constantinople and enter the city, which they completely occupy the following day.

The Union Flag is adopted as the flag of English and Scottish ships.

American…