Daniel O'Connell was an Irish political leader and lawyer who lived from 1775 to 1847. He was known for his efforts to secure Catholic emancipation in Ireland, which aimed to grant political and civil rights to Catholics. O'Connell was a prominent figure in the movement for Irish independence and is often referred to as "The Liberator" for his role in achieving Catholic emancipation. He was also a strong advocate for social and economic reforms in Ireland. O'Connell's legacy as a champion of civil rights and Irish nationalism continues to be celebrated in Ireland and beyond.