At the other end of the town centre, at the end of rue des Chanoines, is the Abbaye aux Dames, commissioned by William's wife Matilda in the hope of saving her soul after committing the godless sin of marrying her cousin. Her monument – the church of La Trinité – is even more starkly impressive than her husband's, with a gloomy pillared crypt, wonderful stained glass behind the altar and odd sculptural details like the fish curled up in the holy-water stoup. The convent buildings today house the regional council but are open to the public (daily 2–5.30pm; guided tours 2.30pm & 4pm; free).