The Kingdom of Leinster was one of the five major kingdoms in ancient Ireland. It was located in the southeastern part of the island and included modern counties such as Wicklow, Wexford, and parts of Kildare and Carlow. The kingdom played a significant role in early Irish history, particularly during the Early Middle Ages. Leinster was known for its rich culture and political influence. It was ruled by various dynasties, with the Uí Néill and Laigin being among the most prominent. The kingdom's capital was Dublin, which later became the center of English rule in Ireland.