Explore Ireland’s rich archaeological legacy, starting with the Megalithic period and moving through the Viking and Medieval eras, with eye-catching artifacts like the Tara Brooch, Cross of Cong, Ardagh Chalice and a glistening collection of prehistoric gold. The museum has two other locations in the city: one dedicated to decorative arts and history at Collins Barracks on the banks of the River Liffey and the wonderfully Victorian Natural History Museum on Upper Merrion Street.