Dublin grew from a Viking port founded in 841, was ruled from London for more than seven centuries and fought its way out in six years, and you can walk through all of it in an afternoon. The Normans built its two cathedrals, the Georgians its squares and red-brick terraces, and the rebels of 1916 left bullet marks on the General Post Office. Then the writers turned the whole city into literature: Swift, Wilde, Yeats, Joyce and Beckett were all Dubliners, and Joyce claimed that if the city disappeared it could be rebuilt from his Ulysses.
It isn't a grand city, and it doesn't pretend to be. It's small, often grey, sometimes rough at the edges and expensive, and most of its life happens in pubs, which here are less bars than living rooms where strangers talk to each other. Five days is the right amount: enough for the big sights, two of the best day trips in Ireland and enough evenings to find your own pub.
This plan keeps each day in one part of town. Day one is Trinity College and Georgian Dublin, day two Kilmainham Gaol, the Guinness brewery and the medieval cathedrals, day three O'Connell Street, 1916 and the Northside, day four a trip to Glendalough in the Wicklow Mountains, and day five the cliffs of Howth and the Docklands. The plan works from a Tuesday, because a few museums close on Mondays. For the bigger picture, see our page on Ireland.