When you go the Little Museum of Dublin, as you should, you’ll book a tour time for the main rooms–give yourself some time before or after to explore the other rooms, though.
The Little Museum, situated in a Georgian house, has over 5000 artifacts of city life donated to the museum by Dubliners. The 30-minute tour gives visitors an overview of some of the more important ones, tied to important incidents in Dublin’s history. The other artifacts are stacked around the museum, so peek into every case and every corner.
A few of the rooms are themed–there’s a U2 room, an Irish Times room, and a room devoted to Alfie Bryne, Lord Mayor and Shaking Hand of Dublin.