Emperor Otto I & Pope John XII: Diploma Ottonianum (+ 12 more historical events on this day!)

A Daily Dose of History: Events on this Day in History · Feb 13, 2026 · 9m

A Daily Dose of History (13 Feb 2026)

Today's historical events:

Emperor Otto I and Pope John XII co-sign the Diploma Ottonianum, recognizing John as ruler of Rome.

The central tower of Ely Cathedral falls on the night of 12th–13th.

The Treaty of Westminster is finalised between Edward IV of England and the Scottish Lord of the Isles.

Challenge of Barletta: Tournament between 13 Italian and 13 French knights near Barletta.

Catherine Howard, the fifth wife of Henry VIII of England, is executed for adultery.

Galileo Galilei arrives in Rome for his trial before the Inquisition.

The Clergy Act…