About 1km north of Slane village is the Hill of Slane, a fairly plain-looking mound that stands out only for its association with a thick slice of Celto-Christian mythology. According to legend, St Patrick lit a paschal (Easter) fire here in 433 to proclaim Christianity throughout the land.
On a clear day, climb the evocative ancient stone steps of the tower to enjoy magnificent views of the Hill of Tara and the Boyne Valley, and (it's said) seven Irish counties.
The story goes that Patrick's paschal fire infuriated Laoghaire, the pagan high king of Ireland, who had expressly ordered that no fire be lit within sight of the Hill of Tara. He was restrained by his far-sighted druids, who warned that 'the man who had kindled the flame would surpass kings and princes'. Laoghaire went to meet Patrick, and all but one of the king's attendants, a man called Erc, greeted Patrick with scorn.
Undeterred, Patrick plucked a shamrock from the ground, using its three leaves to explain the paradox of the Holy Trinity: the union of the Father, the Son and the Holy Spirit in one. Laoghaire wasn't convinced, but he agreed to let Patrick continue his missionary work. Patrick's success that day, apart from keeping his own life and giving Ireland one of its enduring national symbols, was good old Erc, who was baptised and later became the first bishop of Slane. To this day, the local parish priest lights a fire here on Holy Saturday.
The Hill of Slane originally had a church associated with St Erc and, later, a round tower and monastery, but only an outline of the foundations remains. You can also see the remains of a ruined church and tower that were once part of an early-16th-century Franciscan friary.