Perched atop Viminale Hill, the Terme di Diocleziano were the most lavish of all imperial baths built during the height of the Roman Empire. Like the rest, they remained operational until the Goths cut the Roman water supply in 537.
After that, much of the structures were converted into various different spaces, i.e. places of worship, commissioned by the Roman Catholic Church and today they house a collection of funeral art. Just goes to show you, rest and relaxation lead to sin and death...or, maybe, that if you fill up a tomb with water, it makes a brilliant swimming pool.