The mighty River Shannon is Ireland’s ancient and epic artery. A central thoroughfare for millennia, it has its place in myth and legend. For this is a story that encompasses the heavens as well as the watery deep…
The legend of how the River Shannon was born

A river of legends in Ireland's Ancient East

A river of legends in Ireland's Ancient East
But where exactly is the centre of Ireland?
Some say it is the mystical Hill of Uisneach – burial site of the Earth goddess Ériu and the Sun god Lugh, seat of the High Kings, and birthplace of the original Bealtaine, the pagan fire festival marking the start of summer. 

Others say it’s on an island in Lough Ree – the Lake of Kings – a great inland sea on the mighty River Shannon.
Tourists enjoying the scenic Birr Castle
Painting of The Great Telescope at Birr Castle
Left: Tourists enjoying the scenic Birr Castle. Right: Painting of The Great Telescope at Birr Castle.
A few miles downstream there’s the undisputed Ancient Crossroads of Ireland where, at the early Christian site of Clonmacnoise, an east-west “esker” crossed the north-south artery of the Shannon.
This was a historic crossing point: the oak foundations of a 9th-century bridge, 400 feet long, were discovered here only a decade ago. 

(“Esker” is from an old Irish word eiscir, meaning "ridge". Formed more than 10,000 years ago during the last Ice Age – raised up, dry underfoot and relatively level – the eskers were used as communications routes for millennia, providing safe passage across the wetlands and bogs of Ireland’s historic heartlands. Pilgrims and hikers still walk them today.)
View of the majestic monastic site at Clonmacnoise
Beautiful walks along the Shannon
Left: View of the majestic monastic site at Clonmacnoise. Right: Beautiful walks along the Shannon
But the bridge is of course relatively recent in the river’s story.
The Shannon was already an important trading route when Ptolemy mapped it in the 2nd century.

The ancient woodlands and myths of river gods go back further still.  Legend has it that Síonnan, granddaughter of Lír, Celtic God of the Sea, visited the beautiful circular pool now known as the Shannon Pot, and angered the great Salmon of Wisdom living there.  The pool overflowed, to become the source of this great river – and Síonnan drowned in the waters that took her name.

Iron Age peoples travelled this way: a short stretch of oak road built 2,500 years ago has been found close to the river in near-perfect condition, preserved by the special environment of the bog.
Then 1,500 years ago, early Christians founded monastic communities in remote reaches of the river, where the ruins of monasteries, oratories and round towers can still be visited, and peace can still be found. Vikings followed – sailing upstream into the heart of Ireland.

And in more recent centuries the history of Ireland has played out along this important thoroughfare – leaving evidence along its banks: Norman castles and Palladian mansions, and even Napoleonic Martello towers.
Fisherman reeling in fish on the Shannon
Man and dog paddling
Left: Fisherman reeling in fish on the Shannon. Right: Man and dog paddling
These days the Shannon and its huge lakes, tributaries and canals join Lough Erne to form one of Europe’s longest navigable waterways – a stretch of 750 km that is loved by the holidaying Irish and visitors from further afield for its watery and waterside pleasures.

No wonder – for surely this is the way to find the heart of Ireland.
Delve more deeply into the story of Ireland’s Mystical Waterway. Or explore the other themes of Ireland’s Ancient East.
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