Person

Bernard Ato IV Trencavel

d. 1129 · 12th century · Also known as Bernard Aton IV

Bernard Ato IV was a member of the Trencavel family and viscount of Carcassonne, Béziers, Albi, Nîmes and Razès in Languedoc. Inheriting Carcassonne through his mother Ermengard, he built a principality between the rival counts of Toulouse and Barcelona, balancing between them. His descendants ruled from the walled city of Carcassonne until the Albigensian Crusade.

Bernard Ato IV Trencavel
Image: Public domain · Wikimedia Commons

Mentioned in 1 state history

Viscounty of Carcassonne

See also

Cite this entry
APA
The Epoch Institute. (2026). Bernard Ato IV Trencavel. In The Epoch Institute Encyclopedia. https://the-epoch-institute.org/encyclopedia/bernard-ato-iv-trencavel
MLA
“Bernard Ato IV Trencavel.” The Epoch Institute Encyclopedia, The Epoch Institute, 2026, https://the-epoch-institute.org/encyclopedia/bernard-ato-iv-trencavel. Accessed .
Chicago
The Epoch Institute. “Bernard Ato IV Trencavel.” The Epoch Institute Encyclopedia. 2026. https://the-epoch-institute.org/encyclopedia/bernard-ato-iv-trencavel.
Harvard
The Epoch Institute (2026) ‘Bernard Ato IV Trencavel’, The Epoch Institute Encyclopedia. Available at: https://the-epoch-institute.org/encyclopedia/bernard-ato-iv-trencavel (Accessed: ).

Last reviewed October 2026Random entry ↻