Overview
Athlumney Castle has been burned down twice, both times deliberately. In 1649 the Maguire family torched it rather than let Cromwell’s army take it; after the Battle of the Boyne in 1690, Sir Launcelot Dowdall did the same rather than leave a roof over Williamite heads. What survives on the eastern bank of the River Boyne just outside Navan in County Meath is a four-storey 15th-century tower house fused to a three-storey Tudor manor of the late 1500s. It’s a National Monument in OPW care, and you walk it unguided – once you’ve tracked down the key.
If you only have twenty minutes, climb the tower’s spiral stair to find the hidden mural chamber, then drop back to the murder-hole over the entrance. That sequence – defence below, concealment above – tells you more about life here than any panel.
History & Architecture
The name Athlumney comes from the Irish Áth Lúimnigh, meaning “Loman’s ford”. It recalls St Loman, an early Christian bishop and reputed nephew of St Patrick, who is said to have crossed the river at this point. Archaeological surveys have uncovered an early-Christian souterrain on the grounds, confirming the site’s spiritual and strategic importance long before the stone castle rose above it.
A Norman motte was first erected here shortly after 1172 by Amauri de Feipo, following a land grant from Hugh de Lacy, Lord of Meath. The surviving stone tower house dates to the 15th century, built by the powerful Dowdall family, who produced several senior judges in Tudor-era Ireland. The tower’s interior retains its original spiral staircase, first-floor beam-hole sockets, and a barrel-vaulted ground floor protected by a murder-hole above the entrance.
As defensive needs gave way to domestic comfort in the late 16th or early 17th century, a Tudor-style four-bay manor house was attached to the tower’s south-west face. This addition brought square six-pane mullioned windows, a modest limestone doorway, and an oriel window overlooking the river. Large ground-floor kitchens equipped with four fireplaces and two ovens heated the first-floor living quarters, a practical layout for the period.
Dowdall, who had backed the deposed King James II, fled to France after putting his own castle to the torch. Later owners included the Somerville family (Barons Athlumney) and then Bishop Nulty, who bought the estate for the Sisters of Mercy – which is why a convent still sits next door and why, for years, the key lived with the nuns.
A standout historical feature is the secret mural chamber reached by an eleven-step stair from the south wall of the first floor. Scholars identify this as a priest-hole, likely used to conceal Catholic clergy during the Penal Laws. A 1775 watercolour by Gabriel Beranger also records an earlier two-storey addition on the north-east side, showing how the complex evolved across generations.
What to See & Do
Visitors can walk freely among the ruins, tracing the architectural shift from medieval fortress to early-modern residence. Key features to look for include:
- Spiral staircase – The tower’s original stone stairs still climb the way they did 500 years ago. Watch your footing; they’re worn and unlit.
- Murder-hole and barrel vault – Look up at the entrance for the opening through which defenders could drop or pour unpleasant things on attackers below.
- Secret mural chamber – Reached by an eleven-step stair off the first-floor south wall, this concealed room is read as a priest-hole, used to hide Catholic clergy during the Penal Laws.
- Oriel and mullioned windows – The Tudor manor’s square six-pane windows and projecting oriel mark the shift from fortress to comfortable home.
- The riverbank – The Boyne runs below the eastern face, a quiet spot once the climbing’s done.
Interpretive panels near the entrance gate provide historical context, while the surrounding garden walls hint at outbuildings that no longer stand.
Getting There
By Car
- From Dublin: Take the M3 towards Cavan and exit at junction 7. Follow signs for Navan, then turn right onto Athlumney Rd (R153) towards Kentstown. Take the first right onto Convent Rd; the castle sits just off this road.
- Parking: A free parking area is located in the green space of the adjacent Athlumney Castle housing estate. Note that Convent Rd is a narrow one-way street, so you will need to exit via the opposite end of the estate.
By Public Transport
- Bus: Bus Éireann routes 109 and 111 serve Navan town centre. From there it’s about a 10-minute walk along the R153 to Athlumney, or a short taxi ride. There’s no dedicated castle stop, so plan to walk the last stretch.
- Train: Navan has no working railway station, so the bus or a car is the practical way in.
Getting the key
This is the part that catches people out. The castle is locked, and you collect the key from a nearby house with a small refundable deposit – check the sign on the gate for the current arrangement, as it changes. In recent years it has been Mr and Mrs Sherlock at a house in Riverview, or Pat Boylan at Athlumney Manor B&B; the convent school has held it too. Phone ahead if you can; turning up cold on a quiet day can mean a wait. Once inside, there are no guides and no lighting, so bring a torch and watch the stairs.
For the record, archaeological detail is on the Historic Environment Viewer, and the location is on Google Maps.
Pair it with Trim Castle 13 km away, the Hill of Tara 9 km off, or Bective Abbey for a proper Boyne Valley afternoon – and go in the morning, while there’s someone about to hand over the key.