Margaritus of Brindisi was no ordinary admiral. Known to 12th-century chroniclers as the preeminent privateer of the Sicilian fleet, he signed Latin documents in Greek, styling himself 'Margaritos Brentesinos, amiras, Count of Malta.' His origins were murky — descent unclear, loyalties fluid — but his usefulness to William II was not. When the Normans swept into Byzantine Epirus and the Peloponnese in 1185, Margaritus commanded the naval campaign. The Ionian islands were his prize. Within a decade he had moved on, and by 1195 a new dynasty had quietly assumed control: Matthew Orsini, scion of a powerful Roman family, succeeded as lord of the islands. Margaritus vanishes from the record almost as suddenly as he appeared, leaving behind nothing but a title and a precedent for what Italian ambition might achieve in the Greek seas.

The Orsini ruled for over a century, and their story is stranger than simple conquest. To survive, they assembled allegiances like armour. Matthew recognized Venetian dominion in 1209, papal supremacy in 1216, and the authority of the Principality of Achaea in 1236 — genuflecting to every power that might threaten him. Meanwhile, the islands' Orthodox bishopric was abolished, Latin clergy installed in the Episcopal thrones, and the feudal system imposed on a Greek population. His successor Richard, 'most noble count of the palace and lord of Cephalonia, Zakynthos and Ithaca,' authenticated the estates of the Latin bishopric in 1264, even as Ithaca harboured pirates under his nominal rule. Yet the Orsini were not purely alien overlords. Certain members of the family converted to Orthodoxy and married Greek women, their dynasty gradually blending into the islands it governed. When the line died out with John II Orsini in 1335, the Anjou — as suzerains of Achaea — stepped in to claim what had been theirs in theory all along.

The Angevins held the county briefly. In 1357, Robert of Taranto ceded Cephalonia, Zakynthos, and Ithaca to Leonardo I Tocco, governor of Corfu, as a reward for loyalty during a captivity in Hungary — a transaction that traded an island county for a debt of honour. The Tocco proved far more ambitious than their predecessors. Leonardo's grandson Carlo I Tocco conquered Ioannina in 1411 and Arta in 1416, extending Tocco rule deep into the Greek mainland. The Byzantine emperor Manuel II Palaiologos conferred on him the title of despot — the highest dignity in the Byzantine hierarchy after the emperor himself — and Carlo maintained Byzantine court traditions while ruling from his island base. The dynasty cemented its power through strategic marriages into the Florentine Acciaiuoli family and through land grants recorded in the Chronicle of the Tocco: 'inheritances,' 'estates,' 'kratimata,' 'pronoias' — the vocabulary of feudal patronage deployed to win the loyalty of local Greek families like the Galati on Ithaca. The last Tocco, Leonardo III, even reversed one of the Orsini's original acts, reinstating the Orthodox episcopal throne of Cephalonia that his predecessors had abolished. It was not enough.

Venice had watched the Tocco accumulation of power with mounting suspicion. The Serenissima had long claimed suzerainty over these waters; it needed no competitor controlling the approaches to the Adriatic. When the Ottoman Turks dismantled the Tocco mainland territories in 1479, Venice moved decisively. Through the Treaty of Constantinople that year, the county was partitioned: Zakynthos came under direct Venetian rule in 1484, while the Ottomans absorbed the continental holdings. Cephalonia and Ithaca followed Venice in 1500, taken back by force after a military siege. After 294 years, the County Palatine of Cephalonia and Zakynthos simply ceased to exist, absorbed by the empire that would hold the islands for the next three centuries — until Napoleon and his successors remapped the world.

The County Palatine left few monuments above ground. No Orsini castle dominates a Cephalonian hilltop; no Tocco palace survives intact. What remains is more diffuse: the memory of a Latin feudal overlay on a Greek Orthodox world, the palimpsest of competing bishoprics, the land-grant records in the Chronicle of the Tocco. The islands' Orthodox identity — suppressed under the Orsini, cautiously accommodated under the Tocco — endured. Greek was still spoken; Greek customs persisted; the island's priests served, however uncomfortably, under Latin hierarchy. The County Palatine was an episode in a longer story: the story of Cephalonia as a place where empires collide, overlap, and eventually withdraw, leaving the island and its people behind.