Ireland's national emblem is based on the Brian Boru Harp, also known as the Trinity Harp, which is on display in Trinity College Dublin's Long Room.
According to legend, Brian Boru played the harp the night before the Battle of Clontarf in 1014.
However, in reality, the instrument is dated to be 14th or 15th Century, a few centuries after Brian Boru's time.
Watch an interactive report on the harp by RTÉ's Patricia O'Callaghan.
By touching or clicking graphics on screen, you will be able to explore more content without leaving the video.
The interactivity works best on modern browsers such as Chrome, Safari, Firefox and IE11 on desktop and tablet.
The format is compatible with most Android smartphones but will play without interactivity on iPhones.