Siderokastron ( el, Σιδηρόκαστρον) was a medieval fortified settlement on Mount Oeta in Central Greece. Siderokastron is first mentioned in the 13th century. Some scholars have identified it with a place on Mount Knemis ( Buchon),

Delphi Delphi (; ), in legend previously called Pytho (Πυθώ), in ancient times was a sacred precinct that served as the seat of Pythia, the major oracle who was consulted about important decisions throughout the ancient classical world. The oracl ...

or Arachova ( Gregorovius), or Heraclea Trachis ( Neroutsos), but based on the description in the ''

Chronicle of the Morea The ''Chronicle of the Morea'' ( el, Τὸ χρονικὸν τοῦ Μορέως) is a long 14th-century history text, of which four versions are extant: in French, Greek (in verse), Italian and Aragonese. More than 9,000 lines long, the ''C ...

'', it is most likely to be identified with the ruined fortified settlement on a rocky plateau found on an eastern outlier of Mount Oeta, on the banks of the upper course of the Asopos River near the modern villages of Pavliani and Koumaritsi. This identification was made by G. Kolias in 1933. Its name ("Iron Castle" in Greek) possibly derives from the nearby pass of Sideroporta, which gave it a certain strategic importance, as it controlled the mountain roads from the Asopos to the

Boeotic Cephissus The Cephissus ( grc, Κήφισσος), called the Boeotian Cephissus to distinguish it from other rivers of the same name, or Kifisos ( el, Βοιωτικός Κηφισός) is a river in central Greece. Its drainage basin is . In Greek mytholo ...

, and to Dyo Vouna. It is one of the castles popularly known as " Kastro tis Orias". Today it is known as "Kouvelos" (Κούβελος). It is first mentioned in 1275 as one of the castles ceded by the ruler of

Thessaly Thessaly ( el, Θεσσαλία, translit=Thessalía, ; ancient Thessalian: , ) is a traditional geographic and modern administrative region of Greece, comprising most of the ancient region of the same name. Before the Greek Dark Ages, The ...

, John I Doukas, to the Duchy of Athens, as the dowry of his daughter Helena Angelina Komnene. Sometime between 1318 and 1327, it was conquered by the

Catalan Company The Catalan Company or the Great Catalan Company (Spanish: ''Compañía Catalana'', Catalan: ''Gran Companyia Catalana'', Latin: ''Exercitus francorum'', ''Societas exercitus catalanorum'', ''Societas cathalanorum'', ''Magna Societas Catalanorum' ...

, which had taken over the Duchy of Athens. Except for an (uncertain) brief occupation by Albanian raiders in 1367, it remained in the hands of various Catalan families at least up to 1382, and possibly until the Ottoman conquest of the County of Salona in 1392. After that it lost its importance as a border fortress and was abandoned. Today the site is abandoned and accessible only on foot from Pavliani. Until World War II, large portions of the fortifications survived, but today only a few remnants of two defensive walls, running in north-south direction, survive.

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* * Former populated places in Greece Buildings and structures in Phthiotis Ruined castles in Greece Byzantine castles in Central Greece Mount Oeta {{coord, 38, 45, 54.4, N, 22, 24, 13.7, E, region:GR-06, display=title