Thermae Bath Spa £45 million. Thermae Bath Spa eventually opened to the public on 7 August 2006, ending a 28-year period during which the waters remained unavailable for bathing. The spa is largely sited in a new 'Glass Cube' building by Sir Nicholas Grimshaw, near the site of the ancient Royal Bath, which has been interlinked with historic Georgian spa buildings such as the nearby Hot and Cross Baths. The building is in a strongly contemporary style in contrast to its Georgian surroundings. The complex houses both traditional and modern spa facilities. A 2014 survey indicated the spa attracted an extra 260,000 visitors
Diocletian window Diocletian window Diocletian windows, also called thermal windows, are large semicircular windows characteristic of the enormous public baths ("thermae") of Ancient Rome. They have been revived on a limited basis by some classical revivalist architects in more modern times. Diocletian windows are large segmental arched windows (or other openings) which are usually divided into three lights (window compartments) by two vertical mullions. The central compartment is often wider than the two side lights on either side of it. Diocletian windows are named after the windows found in the Thermae (Baths) of Diocletian (AD 302) in Rome. (The Thermae is now