The capital city of Ireland is Dublin. Located on the east coast of the island, Dublin is the largest city in Ireland and serves as its cultural, economic, and political center. Founded by the Vikings in the 9th century, it has a rich history and is known for its vibrant culture, literary heritage, and significant landmarks such as Trinity College, Dublin Castle, and the Guinness Storehouse. The city is also famous for its pubs and music scene, representing both traditional Irish culture and modern urban life. Dublin plays a crucial role in Ireland's identity and daily life.