The Round Tower of Dublin, also known as the Dublin Castle Tower, is a historic structure located in the heart of Dublin, Ireland. Built in the 12th century, it served as a defensive tower and a lookout point. The tower is part of the larger Dublin Castle complex, which has played a significant role in Irish history. Standing at approximately 30 meters tall, the tower features a distinctive circular shape and a conical roof. It is one of the few remaining structures from the medieval period in Dublin and is a popular tourist attraction, offering visitors a glimpse into the city's rich past.