In the middle Byzantine period, the Notitiae Episcopatuum show Larissa with ten suffragan sees; these were in order Demetrias, Pharsalus, Thaumakos, Zetouni (Lamia), Ezeros, Loidoriki, Trikke, Echinus, Kolydros, and Stagoi.[7][8] Before the turn of the 10th century, Larissa also controlled Neopatras and the Spercheios valley, but sometime before 900 it was raised to a separate metropolis, while Pharsalus was likewise raised before 900 to the rank of an autonomous archbishopric.[8] In ca. 1020, Stagoi was ceded for a time to the Archbishopric of Ohrid.[9]
Subsequently, the number of suffragans increased and about the year 1175 under the Emperor Manuel I Comnenus, it reached twenty-eight.[10]
Following the Fourth Crusade and Thessaly's incorporation into the Kingdom of Thessalonica, a Roman Catholic archbishop was installed in the place of the previous Greek Orthodox metropolitan.[11] The city was soon recovered by the Greek Despotate of Epirus, however, possibly as early as 1212, and the Greek Orthodox metropolitan restored.[12] At the close of the 15th century, under the Turkish domination, there were only ten suffragan sees,[13] which gradually grew less and finally disappeared.
In 1881, Thessaly was ceded to Greece. In 1900, the see of Farsala and Platamon was united with Larissa, which became the Metropolis of Larissa and Platamon. Since the 1970s, the see has borne its current title.
Known bishops
St. Achillius.The late Metropolitan of Larisa, Ignatios.
Nicol, Donald MacGillivray (2010). The Despotate of Epiros 1267–1479: A Contribution to the History of Greece in the Middle Ages. Cambridge University Press. ISBN 978-0-521-13089-9.
Trapp, Erich; Beyer, Hans-Veit; Walther, Rainer; Sturm-Schnabl, Katja; Kislinger, Ewald; Leontiadis, Ioannis; Kaplaneres, Sokrates (1976–1996). Prosopographisches Lexikon der Palaiologenzeit (in German). Vienna: Verlag der Österreichischen Akademie der Wissenschaften. ISBN 3-7001-3003-1.