The Cathédrale Saint-Pierre is the older and architecturally more interesting of Lisieux's two major religious buildings. Construction began in the 12th century and continued through the 13th, with a Romanesque apse and Gothic nave — a combination that reflects the transition between the two styles that was happening in Normandy at exactly that period.
The interior is spacious and well-proportioned, with good stained glass in the chancel. Bishop Pierre Cauchon, who presided over the trial of Joan of Arc in 1431, is buried here — one of several historical connections that make the cathedral more than just a secondary attraction to the modern basilica. The exterior is best seen from the square to the south, where the relative simplicity of the Norman Gothic facade is clear.