The Antititulus, in the Palermo Cathedral, is a longitudinal room,  with an almost transept-like appearance, arranged in front of the three apses. Next to the Titulus and Antititulus are the sacristies, which have now been converted into the Cathedral Treasury. In Monreale, the Antititulus corresponds with the Post Presbytery that divides the area of the presbytery from the Tribuna Maggiore of the central apse.