Constantius I, the father of Emperor Constantine the Great, died in York, which was called Eboracum at the time.

Please use the link below for more on Constantius.

Constantius III died on 421-09-02.

Constantius Chlorus, whose full name was Flavius Valerius Constantius, was a Roman emperor who reigned from 293 to 306 AD. He was the father of Constantine the Great and played a key role in the Tetrarchy, a system of joint rule established by Emperor Diocletian. Constantius Chlorus was known for his military successes and efforts to restore stability to the Roman Empire.

Constantius Chlorus

The ancient Roman emperor Augustus dedicated the Theater of Marcellus.