Baiae was an ancient Roman town located on the northwest shore of the Gulf of Naples, near modern-day Bacoli, Italy. Renowned in antiquity as a luxurious resort for Rome’s elite, Baiae was famous for its natural hot springs, which were believed to have therapeutic properties, and for its elaborate villas and bath complexes. The town became synonymous with opulence and leisure, attracting figures such as Julius Caesar, Nero, and Hadrian, who built grand residences overlooking the sea. Baiae was also known for its innovative engineering, including domed structures and heating systems used in its baths.