Its cathedra is found within the neoclassic Cathedral Basilica of St. Dionysius the Areopagite, in the episcopal see of Athens.

The See of Athens is one of the oldest Christian bishoprics, dating back to Hierotheos the Thesmothete in the mid-1st century AD.

The city's incumbent Greek Orthodox bishop, Michael Choniates, retired to the island of Kea, and a Latin Catholic archbishop was installed in his place, with the French cleric Berard being elected to the post in 1206.

[2][3] The Crusaders largely maintained the ecclesiastical order they found, appointing Catholic bishops to replace the Orthodox prelates.

[4] Thus, in a letter by Pope Innocent III to Berard in 1209, 11 suffragan sees are mentioned under Athens, identical to those under Byzantine rule, although most of them were de facto vacant: Negroponte (Egripontis), Thermopylae (Cermopilensis, seat in Bodonitsa), Davleia (Davaliensem), Aulon (Abelonensem), Oreoi (Zorconensis), Karystos (Caristiensem), Koroneia (Coroniacensem), Andros (Andrensem), Megara (Megarensem), Skyros (Squirensem), and Kea (Cheensem).