Guinevere had an affair with a knight, Sir Lancelot.
In medieval romances , one of the most prominent story arcs is Queen Guinevere 's love affair with her husband 's chief knight , Lancelot .	romances	Chivalric romance	Lancelot	Lancelot
Sir Lancelot du Lac -LRB- meaning Lancelot of the lake , baptised as Galahad -RRB- was one of the Knights of the Round Table in the Arthurian legend .	Knights of the Round Table	Knights of the Round Table	Arthurian legend	Arthurian legend
