The capital of the Republic of Ireland is Dublin. Situated on the eastern coast of the island, Dublin is the largest city in Ireland and serves as the cultural, economic, and political heart of the country. It has a rich history dating back to its founding by the Vikings and has grown into a vibrant metropolis known for its literature, music, and lively pub culture. Dublin is also home to numerous historic sites, including Dublin Castle, Trinity College, and the famous Grafton Street. The city offers a blend of the old and new, making it a dynamic destination for both locals and visitors.