During the Iron Age there was heightened activity at a number of important royal ceremonial sites, including Tara, Dún Ailinne, Rathcroghan and Emain Macha. Each was associated with a Gaelic tribe. The most important was Tara, where the High King (also known as the King of Tara) was inaugurated on the Lia Fáil (Stone of Destiny), which stands to this day. According to the Annals, this era also saw, during the 7th century BCE, a branch of the Heremonians known as the Laigin, descending from Úgaine Mór's son Lóegaire Lorc, displacing the Fir Bolg remnants in Leinster. This was also a critical period for the Ulaid (earlier known as the Irians) as their kinsman Rudraige Mór took over the High Kingship in the 3rd century BCE; his offspring would be the subject of the Ulster Cycle of heroic tradition, including the epic Táin Bó Cúailnge. This includes the struggle between Conchobar mac Nessa and Fergus mac Róich.