The Fenian Cycle, known in Irish as the Fiannaíocht is one of the most enduring of the four great cycles of Irish literature, and the one that had by far the longest living tradition, remaining a vital part of oral storytelling culture in Ireland and Scotland well into the modern era and in some communities into the twentieth century. It centres on Fionn mac Cumhaill, anglicized as Finn McCool, the leader of the Fianna, a semi-independent warrior band who serve the high king of Ireland but exist outside the normal structures of tribal society, living in the wild places of the landscape, hunting, fighting, and embodying a particular heroic ideal that is distinctly different from the aristocratic court-warrior culture of the Ulster Cycle. The Fianna are recruited from the finest warriors in Ireland but must pass extraordinary tests of courage, knowledge and physical endurance to join, a candidate must be able to recite twelve books of poetry, defend himself against multiple spearmen while buried to the waist, and run through a forest without breaking a twig or loosening his hair. Around Fionn gather a magnificent constellation of companions, his grandson the poet-warrior Oisín, the tragic Diarmait Ua Duibne whose love-spot made every woman who saw him fall helplessly in love, the mighty Goll mac Morna who killed Fionn’s father and became his greatest rival and companion, and the swift Caílte mac Rónáin whose conversations with Saint Patrick in the Acallam na Senórach (Dialogue of the Ancients) provide one of the most charming and poignant frameworks in all of Irish literature.
The emotional and narrative heart of the Fenian Cycle is the great pursuit tale, Tóraigheacht Dhiarmada agus Ghráinne, in which Gráinne, betrothed to the aging Fionn, places a magical compulsion upon the reluctant Diarmait to flee with her across Ireland in a desperate elopement that becomes one of the great love stories of European literature. For years Fionn pursues them across every mountain and glen of Ireland, and the landscape itself becomes mapped with the memory of their flight, dolmens across Ireland are still called Leaba Dhiarmada agus Ghráinne (the Bed of Diarmait and Gráinne) to this day. The cycle ends in tragedy, Diarmait is killed through the connivance of Fionn on the slopes of Beann Ghulban, and Fionn himself fades from the world, leading to the great lament of Oisín who survives into the Christian age and mourns the passing of the heroic world in conversations with Patrick that are suffused with melancholy beauty. Unlike the Ulster Cycle with its aristocratic court setting the Fenian Cycle has a more democratic and romantic character, its heroes roam free in nature, its values emphasize loyalty, generosity, love and the bittersweet beauty of a vanished heroic age, which is precisely why it captured the imagination of ordinary people across centuries and became the living heartbeat of Gaelic oral tradition long after the other cycles had retreated into the manuscript libraries of monasteries.
Ossianic Poetry
| Boyish Exploits of Fionn | Boyish Exploits of Fionn |
| Cath Chnoc an Áir | The Battle of the Hill of Slaughter |
| Finn’s Song of Winter | Finn’s Song of Winter |
| Finn’s Song of Summer | Finn’s Song of Summer |
| Ossian | The Ossian Poems from the Book of the Dean of Lismore |
| Ro loiscit na láma-sa | These Hands Have Been Withered |
| Seilg Shléibhe gCulainn | Chase of Sliabh Guilleann |
| Scél Lém Dúib | Finn’s Winter Tidings |
| Ut dixit Gráinne ingen Chormaic fri Finn | Grainne on Diamuid |