Free, and it holds the best prehistoric gold collection in western Europe plus four Iron Age bog bodies. The single most underrated building in Dublin.
What is in it
Ór — Ireland’s Gold is the headline: Bronze Age goldwork from roughly 2200 to 500 BC, and it is the largest and finest collection of prehistoric gold in western Europe. Lunulae, torcs, dress fasteners, collars. The quantity is genuinely startling — Ireland had accessible alluvial gold and a metalworking tradition that ran for well over a thousand years.
The bog bodies are the part people talk about afterwards. Four Iron Age men, preserved by acidic peat, recovered from midland bogs. Clonycavan Man still has his hair, styled with a resin imported from France. Old Croghan Man’s hands are intact enough to show manicured nails and no manual labour. Both were killed violently and deliberately, and the current reading is that they were kings or royal candidates, ritually sacrificed at boundaries.
They are displayed in individual darkened chambers you choose to walk into, with the reasoning explained first. It is handled with care and it is not sensational, and the rooms are quiet in a way the rest of the museum is not.
Early medieval metalwork: the Ardagh Chalice, the Tara Brooch, the Derrynaflan Hoard, the Cross of Cong. This is the same culture that produced the Book of Kells, working in silver, gold and enamel, and the technical standard is absurd.
Viking Dublin, drawing on the Wood Quay excavation — swords, combs, leather, the timber of the town.
The building
Thomas Newenham Deane’s 1890 rotunda, with a mosaic floor, marble columns and a domed entrance hall that is worth a minute on its own before you go anywhere.
Practical
Free, no ticket, no booking. Closed Mondays, like most Irish national institutions — check before building a Monday around it.
Two hours does it properly. The gold and the bog bodies are both on the ground floor and can be done in an hour if that is all you have.
The other branches
All free, all worth knowing about:
Decorative Arts and History at Collins Barracks, across the river — furniture, silver, fashion, and a strong military history section including the 1916 material.
Natural History on Merrion Street, universally called the Dead Zoo: a Victorian cabinet museum barely altered since 1857, with the skeletons of three giant Irish deer over the entrance. It is a museum of museums and it is wonderful.
More Museums

National Gallery of Ireland
Free, with a Caravaggio that spent decades hanging unrecognised in a Jesuit dining room a mile away, and the best Jack B. Yeats collection anywhere.

EPIC The Irish Emigration Museum
Ten million people left this island. This is the museum about where they went and what they did, in the vaults of a nineteenth-century dock warehouse.

