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- Abbaye Saint-André (Villeneuve-lès-Avignon, France)1
- Abbaye aux Dames (Caen, France)1
- Abbazia di S. Maria di Porcilia (Padua, Italy)1
- Abbazia di Santo Stefano (Pistoia, Italy)1
- Abbots--Appointment, call, and election1
- Ablutions (Islamic law)1
- Abnāsī, Ibrāhīm ibn Mūsá, 1325-1399. Sharḥ al-Alfīyah1
- Absolution1
- Abu Natser Shemuʹel, ha-Leṿi1
- Abu ʻAmar Seʹadyah, ha-Leṿi1
- Abū Madyan, -1197 or 1198. ʻAqīdah1
- Abū Yazīd Bisṭāmī, Ṭayfūr ibn ʻĪsá, -874?1
- Abū Yūsuf Yaʻqūb, 731 or 732-7981