Château Quintus is a Grand Cru estate in the commune of Saint-Émilion.  It was formed in 2011 when Domaines Clarenece Dillon bought Château Le Tertre Daugay, renaming it Quintus.  This was inspired by the Gallo-Roman tradition of naming the fifth child in a family Quintus (the other four 'grands vins' in the family being Haut-Brion, Haut-Brion Blanc, La Mission Haut-Brion and La Mission Haut-Brion Blanc).  The name also points to the Roman history of Saint-Émilion, with the remains of a fort or 'oppidum' overlooking the vineyards.  In 2013 neighbouring Château L'Arrosée was also purchased, bringing the size of Quintus to 15 hectares.  The wine is made by the same team as at Haut-Brion and there is clearly a determination for the estate to have the same status and reputation as the First Growth.

The vineyards, which are adjacent to Angelus and surrounded by Belair-Monange, Canon and Pavie, are planted to 66% Merlot, 26% Cabernet Franc and 8% Cabernet Sauvignon.  The second wine is Dragon de Quintus.