[1] The reputedly impregnable Château de Vergy was sited on a rocky spur near Beaune in Burgundy (present-day communes of Reulle-Vergy, L'Étang-Vergy and Curtil-Vergy).
Guérin was stoned around 681 at the foot of the rocky spur at Vergy, shortly after his brother's martyrdom.
[3] In the 12th century Vergy was considered one of the most impregnable fortresses in the kingdom by Louis VII of France.
With the other Burgundian possessions, Vergy was merged into the royal domains in 1477, on the death of Charles the Bold.
In 1609, following the participation Charles of Lorraine (governor of Burgundy) in the Catholic League from 1589 onwards, Henri IV completely razed the castle.