Dermot MacMurrough was an Irish king of Leinster, known for his role in the 12th century. He is often remembered for his controversial actions that led to the arrival of the Normans in Ireland. Seeking to regain his throne, he sought assistance from Richard de Clare, also known as Strongbow, which ultimately changed the course of Irish history. MacMurrough's reign was marked by political strife and conflict. His alliances with foreign powers, particularly the Normans, set the stage for centuries of English involvement in Ireland. His legacy is complex, as he is both credited with initiating significant change and criticized for his methods.