
The Duchy of Athens was one of the Crusader states set up in Greece after the conquest of the Byzantine Empire during the Fourth Crusade as part of the process known as Frankokratia, encompassing the regions of Attica and Boeotia, and surviving until its conquest by the Ottoman Empire in the 15th century.

The Frankish Tower was a medieval tower built on the Acropolis of Athens by the Franks as part of the palace of the Dukes of Athens. It was demolished by the Greek authorities in 1874, on the initiative and with funding from Heinrich Schliemann.

The Frankish tower of Lilaia is a late medieval tower near Lilaia, in Phocis, central Greece.

Pelasgia, is a town and a former municipality in Phthiotis, Greece. Since the 2011 local government reform it is part of the municipality Stylida, of which it is a municipal unit. The municipal unit has an area of 128.334 km2, the community 52.089 km2. In the 2011 census, the municipal unit of Pelasgia numbered 2,860 inhabitants, the town proper 1,497.

The Roman Catholic Archdiocese of Athens is an archdiocese of the Catholic Church located in the city of Athens in Greece. The seat is the neoclassic Cathedral Basilica of St. Dionysius the Areopagite.

The Lordship of Salona, after 1318 the County of Salona, was a Crusader state established after the Fourth Crusade (1204) in Central Greece, around the town of Salona.

The Duchy of Neopatras was a Catalan-dominated principality in southern Thessaly, established in 1319. Officially part of the Crown of Aragon, the duchy was governed in conjunction with the neighbouring Duchy of Athens by the local Catalan aristocracy, who enjoyed a large degree of self-government. From the mid-14th century, the duchies entered a period of decline: most of the Thessalian possessions were lost to the Serbian Empire, internal dissensions arose, along with the menace of Turkish piracy in the Aegean and the onset of Ottoman expansion in the Balkans. Enfeebled, the Catalan possessions were taken over by the Florentine adventurer Nerio I Acciaioli in 1385–1390.
The Tower of Aliartos or Tower of Moulki is a late medieval tower near Aliartos, in Boeotia, central Greece. It sits on a cliff, located close to the modern national road from Thebes to Livadeia, and on the southern shore of the ancient Lake Copais.

The War of the Euboeote Succession was fought in 1256–1258 between the Prince of Achaea, William II of Villehardouin, and a broad coalition of other rulers from throughout Frankish Greece who felt threatened by William's aspirations. The war was sparked by William's attempt to gain control of a third of the island of Euboea, which was resisted by the local Lombard barons with the aid of the Republic of Venice. The Lord of Athens and Thebes, Guy I de la Roche, also entered the war against William, along with other barons of Central Greece. Their defeat at the Battle of Karydi in May/June 1258 effectively brought the war to an end in an Achaean victory, although a definite peace treaty was not concluded until 1262.