One of Ruaidrí's first acts as king was the subduing of Leinster, which resulted in the exile of its king, Diarmait Mac Murchada. Ruaidrí then obtained terms and hostages from all the notable kings and lords. He then celebrated the "Oneach Tailtann", a recognised prerogative of the High Kings, and made a number of notable charitable gifts and donations. However, his "caput" remained in his home territory in central Connacht (County Galway). Ireland's recognised capital, Dublin, was ruled by Ascall mac Ragnaill, who had submitted to Ruaidri.