#chapel
- Absidiola — A small, secondary apse that usually opens into the main apse or the transept arms of a Christian church, housing a secondary altar or sacred relics. In the hermeneutics of religious space, the absidiola functions as a devotional micro-universe, a space dedicated to intimate meditation, penitence, or the veneration of particular ethical values embodied by saints.
- Aeken — The historical, archaic, or old Flemish/Dutch dialectal name for the city of Aachen (located in present-day Germany, near the borders with Belgium and the Netherlands). The term is found in medieval documents, old chronicles, and European historiography to designate the ancient residence capital of Charlemagne and the historic coronation site of German kings.
- Aix-la-Chapelle — The French name for the historic city of Aachen, located in western Germany, near the borders with Belgium and the Netherlands. The term holds immense historical significance, referring to the Palatine Chapel built by Charlemagne, who made the city the primary residence of the Carolingian Empire; the city is famous in European diplomacy for the international peace treaties signed here in 1668 and 1748.