Long before the Byzantines raised their walls at Rogoi, the hill above the Louros knew a different life. Bouchetion — an Elean colony founded in the 7th century BC — occupied this same strategic promontory, serving as a seaport for inland settlements at Elatria and Baties. Back then, the Ambracian Gulf extended further inland than it does today, and the hill that now sits comfortably inland once looked out over open water. Bouchetion grew, fortified in stages: a first circuit wall of 450 metres enclosing the hilltop, later expanded to 730 metres, and finally to an outer circuit of 1,000 metres enclosing 37,000 square metres of settlement. The Molossian king Alexander I incorporated it into the kingdom of Epirus in the 4th century BC. Roman legions sacked it in 167 BC during the Third Macedonian War. And then, in 31 BC, Emperor Augustus founded the grand new city of Nicopolis nearby, drawing people and commerce away. Bouchetion fell silent. The hill waited.

The medieval settlement of Rogoi first appears in the Notitiae Episcopatuum — the official register of bishoprics under the Patriarchate of Constantinople — as a suffragan see of the Metropolis of Naupaktos, in the reign of the Byzantine emperor Leo VI. Scholars place its resettlement in the 9th century, during the long Byzantine effort to recover Epirus from the Slavic-speaking peoples who had taken control of the region in the late 6th and early 7th centuries. The name "Rogoi" is itself a puzzle. It has been suggested as Slavic in origin, but a more compelling theory derives it from a Sicilian Greek word for granaries — granai — which would suggest that Sicilian settlers were deliberately brought in to anchor the new community. It is a small detail, but it conjures the texture of Byzantine statecraft: populations transplanted across the empire's fraying edges, trading their homelands for a hillside in Epirus.

The 14th and early 15th centuries were Rogoi's most turbulent era. In 1303 or 1304, Philip I, Prince of Taranto, attacked the castle and failed to take it, repulsed by the regent of the Despotate of Epirus, Anna Palaiologina Kantakouzene, who refused to acknowledge Angevin suzerainty. In 1338 or 1339, Epirote rebels under Alexios Kabasilas seized Rogoi and Arta during the chaotic Byzantine annexation of Epirus; Emperor Andronikos III Palaiologos and his Grand Domestic, John Kantakouzenos, blockaded the castle until it surrendered. Serbian rule followed. Then, by 1367, both Rogoi and Arta had passed to the Albanian chieftain Pjetër Losha. At Losha's death in 1374, his domain passed to the Albanian lord of the Acheloos region, Gjin Bua Shpata, and the Shpata family held Rogoi until 1416, when Carlo I Tocco, the Count Palatine of Cephalonia and Zakynthos, defeated the last Albanian ruler, Yaqub Shpata, and restored the traditional boundaries of the Despotate of Epirus. It was a succession of sieges and surrenders, of lords whose authority seldom outlasted a generation.

In 1436 and again in 1448 — just a year before the Ottomans arrived to end the settlement for good — the Italian humanist and traveller Ciriaco de' Pizzicolli visited Rogoi and wrote it down. He noted something remarkable: the church inside the castle kept the relics of Saint Luke. Contemporary Serbian texts explained how they came to be there: after the Fourth Crusade sacked Constantinople in 1204, the relics had been moved westward, eventually coming to rest on this hill above the Louros. Whether the story is accurate or not, it says something about the weight the place carried in the late medieval imagination. After the Ottoman conquest in 1449, Rogoi was abandoned, the population dispersed, the church emptied. In 2019, the Orthodox Church revived the ancient title of Bishop of Rogoi and conferred it on Filotheos Theodoropoulos as assistant bishop of the Archbishopric of Athens — an ecclesiastical continuity stretching across nearly twelve centuries.

The medieval castle visible today was built on the foundations of the ancient acropolis, following the line of its earliest fortification phases. Look closely at the masonry and you can see the join: ancient stonework below, Byzantine rebuilding above. The hill is 29 metres tall, modest in absolute terms but commanding over flat marshland. Three sides fall away to the Louros — or rather to the altered channel the medieval inhabitants carved. The fourth side opens toward Nea Kerasounta, the modern village that sits nearby. There are no grand monuments here, no obvious signage marking the Elean colony or the Albanian chieftains. The hill simply rises, and the walls run along it, layer over layer.