About us

An independent Dublin company that works at the threshold.

Celtic Penitentiary was founded in 2015 by a former National Archives researcher and a retired prison-history academic, on a single argument: the perimeter of a building has a story too, and you don't need a ticket to read it.

Our story

Founded in 2015 by people who'd already had the inside tour.

Síle Donnelly and Cormac Brennan met in 2013 in a queue at the photocopier of the National Archives on Bishop Street. Síle had been there twelve years; Cormac had come in to chase down committal records for his book on Kilmainham. They went for tea, then lunch, then a series of long arguments about the difference between the museum tour of a Dublin building and the standing-on-the-pavement tour, and which one actually told you what the building was.

By 2015 they'd quit their day jobs, registered as a company, and walked their first paying group — eight visitors from Boston with an interest in family records — round the perimeter of Kilmainham Gaol on a wet March morning. We have walked roughly the same route, with refinements, every week since, and we have never once gone inside.

Today there are four resident guides. Síle and Cormac still walk most weeks. Aoife joined in 2019, Brendan in 2021. We turn down more bookings than we accept, on purpose.

Síle Donnelly and Dr Cormac Brennan, the founders of Celtic Penitentiary, photographed on the cobbles of Thomas Street.
The threshold rule

Why we never go inside.

It is the question we get most often, and we don't tire of answering it.

Three reasons, in order:

1. Because the inside is already well told. Kilmainham Gaol Museum runs its own excellent guided tour. So does Dublin Castle. So do Christ Church and St Patrick's. We see no reason to add a thinner version of what they already do well, and we wouldn't want to be paid to.

2. Because the perimeter has a different story. The gate, the courtyard, the laneway, the boundary wall, the church-yard — these are the parts of a Dublin building that touch the city. The arguments fought outside Kilmainham are not the arguments fought inside. The crowd at the GPO on Easter Monday 1916 was outside before it was inside. The Custom House burned from the river. We work where the building meets the street, because that's where the city happens.

3. Because we want to leave you free. Most of our walkers do go inside one or more of the buildings on their route — afterward, on their own time, often the next morning. Our walks are designed to leave you with a short, sharp set of questions to take through the door. We send a one-page note with each booking on which interior tour we recommend, on which day, and why.

So, to be unambiguous On a Celtic Penitentiary walk you will not enter Kilmainham Gaol. You will not enter Dublin Castle, Christ Church, St Patrick's, the GPO, the Custom House, the Four Courts, Trinity College, the National Museum, or the Houses of Parliament. The walk happens entirely on Dublin's public streets, footpaths, and small public parks. If that's not the walk you wanted, please book the museum directly — we won't be offended, and we'll send you the link.
How we run

A small company, on purpose.

Some practical truths about how Celtic Penitentiary works behind the scenes.

Twelve walkers, no more

We hard-cap each walk at twelve guests. If you arrive and we're at twelve, we will, with apologies, ask you to switch to a different date. If we don't hold the cap, the walker at the back can't hear the guide at a busy gate.

Resident guides only

We never use freelance casuals. Our four guides are on long contracts, are paid a flat per-walk fee, and have no commission incentives. The walk you book in March is the walk you'd get in October.

No commission detours

We will recommend a coffee stop or a bookshop at the end of a walk if you ask, and we will tell you why. We do not take a referral fee from any of them.

Quotes within a working day

Every enquiry gets an answer within one working day from a named member of the team. If we can't fit your dates, we'll say so in the same email.

Refunds without argument

If you cancel more than seven days out, you get a full refund. If we cancel for weather, you get a full refund or a re-book. If a walker simply doesn't enjoy themselves, write to us.

We pay our taxes

Celtic Penitentiary Tours Ltd is registered in Ireland and files with the Companies Registration Office. We are happy to send our company number on request.

Walk with us

Ten years of walking the same streets and still finding new things.

If any of this sounds like your kind of afternoon, write to us and tell us your dates. We'll quote within a working day.

Request a quote See the three walks