Cagliari is the capital of Sardinia, an island located in the Mediterranean Sea off the coast of Italy. It is the largest city on the island and is known for its beautiful beaches, archaeological sites, and vibrant nightlife. Cagliari has a long history, dating back to the Phoenicians in the 8th century BC. It was an important port for the Romans and later became part of the Kingdom of Aragon in the 14th century. Today, Cagliari is a popular tourist destination, offering visitors a chance to explore its rich culture and history.