National Gallery of Ireland

Listen for a moment. Out on the street, Dublin traffic hisses over wet tarmac and buses sigh at the kerb. Step inside, and the sound drops away. Footsteps soften. Voices fall to a murmur. The light changes too. It falls cool and grey through high windows onto pale walls and polished floors. You are standing in the country's main collection of European and Irish art. Here, a few centuries of painting are gathered under one roof.

The gallery sits on the western edge of Merrion Square, one of Dublin's great Georgian squares. Georgian here means the long eighteenth-century era of brick terraces, tall sash windows and brightly painted front doors. Walk out of the gallery and you are among them. Oscar Wilde grew up in a house on the corner of this square. Next door to the gallery stands Leinster House, where the Irish parliament sits. The Natural History Museum is close by. This is the city's civic and cultural heart, at walking pace.

Before you go any further, look for the bronze man who stands on the lawn outside. That is William Dargan, a railway engineer of the nineteenth century. In 1853 he paid for a great industrial exhibition on the lawn beside this building. It was Dublin's answer to London's Great Exhibition, the famous show of industry and design two years earlier. Out of the enthusiasm it created came the idea for a national gallery. Parliament passed an act to found it in 1854, and the doors first opened in 1864.

Dargan himself reportedly refused honours for his generosity. So the city thanked him in another way. His statue stands at the entrance, and the oldest part of the building carries his name, the Dargan Wing. Notice its grand stone stairs and its tall, top-lit rooms. Victorian gallery designers loved daylight from above. It falls evenly on canvases and avoids glare. Even today, on a bright afternoon, you can feel how that light changes the colours in front of you.

Now for the first surprise. One of the most important paintings in the building spent decades unrecognised in a dining room. It is The Taking of Christ, by the Italian painter Caravaggio. He was a master of dramatic light and shadow, active around 1600. For many years the canvas hung in a Jesuit house on Leeson Street, a short walk from here. People assumed it was a copy. In the early 1990s, a restorer at this gallery looked closely and saw something more.

Cleaning and research confirmed it. This was the lost original, missing for generations. The discovery made headlines around the world. The Jesuit community chose to place the painting on indefinite loan to the nation. So when you stand in front of it, you are looking at a picture that was once part of daily meals, coffee and conversation. Look at Judas leaning in for the kiss. Look at the soldier's black armour. And notice the man at the far right holding a lantern. Many people believe this is the artist himself.

The second surprise is a story of theft. A small, quiet painting by the Dutch master Johannes Vermeer hangs here. It is called Lady Writing a Letter with her Maid. Vermeer painted very few works, so each one is precious. This one was stolen twice from Russborough House, a country mansion south of Dublin. The first theft came in 1974, the second in 1986. Both times it was recovered. Afterwards, its owner, Sir Alfred Beit, gave it to the gallery with other masterpieces from his collection.

That Beit gift also includes a painting by the Spanish artist Diego Velázquez. It shows a kitchen maid at work. Behind her, through a small opening, you can just make out a religious scene. Many visitors walk past without noticing that tiny window. It rewards a slow look. This is the rhythm of the whole gallery, really. The famous names draw you in. But the details are what stay with you on the walk home.

Irish art has a special place here. Look for the rooms of Jack B. Yeats, brother of the poet William Butler Yeats. His later canvases are thick with paint, bright with colour and full of movement. Horses, fairs, rivers and lonely figures appear again and again. Elsewhere, you may find Daniel Maclise's enormous Marriage of Strongbow and Aoife. It shows a twelfth-century moment when Norman power arrived in Ireland. The canvas is crowded with figures, and it is far larger than you might expect.

Here is one more thing most visitors miss. The gallery owns a set of watercolours by the English painter J. M. W. Turner. By the terms of the original bequest, they are shown only in January. In winter the daylight is weakest, so the fragile pigments suffer less. If you visit in January, you are lucky. If not, you have a good reason to return. It is a small rule, but it says a lot about how carefully this collection is guarded.

Another great friend of the gallery was the playwright George Bernard Shaw. He grew up in Dublin, and he said he gained much of his education wandering these rooms as a boy. When he died, he left a share of his royalties to the gallery. Later, his play Pygmalion became the musical My Fair Lady. Its success sent a steady flow of money here. A statue of Shaw stands in the gallery. So in a way, a Hollywood musical helped to buy paintings for Dublin.

The building has grown over the years. The most striking addition is the Millennium Wing, which opened in the early 2000s. Its entrance faces Clare Street, with clean pale stone and a tall, bright atrium. Then, in the 2010s, the historic wings went through a long refurbishment. They reopened in 2017, with restored rooms and better light. Walking between old and new parts, you can feel the change in mood. Ornate Victorian ceilings give way to open modern space.

Take your time as you move through. There is no right order. Some people head straight for Caravaggio. Others drift and let a face in a portrait stop them. Sit on a bench for a few minutes. Watch how other visitors lean in, step back, and lean in again. Listen to the quiet. Notice how the floors creak in some rooms and stay silent in others.

When you are ready to leave, pause by the doors. Outside, Merrion Square waits with its railings, its trees and its coloured Georgian doors. William Dargan is still standing on his plinth, watching the street. Carry one image out with you... a lantern in the dark, a letter half-written, a maid at her kitchen table. Then step back into the sound of Dublin, and see how differently the city looks.