Person

Constantius I

c. 250–306 · 3rd century · Also known as Constantius Chlorus

Constantius I, known as Chlorus, was a Roman emperor of the Tetrarchy, made Caesar in the west under Maximian in 293 and senior emperor in 305. He took Boulogne from the usurper Carausius in 293 and recovered Britain from Allectus in 296. He died at York in 306, where his troops proclaimed his son Constantine emperor.

Constantius I
Image: Marie-Lan Nguyen · Public domain · Wikimedia Commons

Mentioned in 1 profile

Kingdom of the PictsMilitary

Mentioned in 1 state history

Carausian Empire

See also

Cite this entry
APA
The Epoch Institute. (2026). Constantius I. In The Epoch Institute Encyclopedia. https://the-epoch-institute.org/encyclopedia/constantius-i
MLA
“Constantius I.” The Epoch Institute Encyclopedia, The Epoch Institute, 2026, https://the-epoch-institute.org/encyclopedia/constantius-i. Accessed .
Chicago
The Epoch Institute. “Constantius I.” The Epoch Institute Encyclopedia. 2026. https://the-epoch-institute.org/encyclopedia/constantius-i.
Harvard
The Epoch Institute (2026) ‘Constantius I’, The Epoch Institute Encyclopedia. Available at: https://the-epoch-institute.org/encyclopedia/constantius-i (Accessed: ).

Last reviewed October 2026Random entry ↻