Ancient Roman architecture of being in their houses, as they instead would go to public baths, and engage in other communal activities. Many lighthouses were built around the Mediterranean and the coasts of the empire, including the Tower of Hercules at A Coruña in northern Spain, a structure which survives to this day. A smaller lighthouse at Dover, England also exists as a ruin about half the height of the original. The light would have been provided by a fire at the top of the structure. All Roman cities had at least one thermae, a popular facility for public bathing, exercising and socializing.
Roman Thermae (Varna) and Baths of Diocletian in the imperial capital Rome and the baths of Trier. The thermae are the largest in the Balkan region and the biggest surviving ancient building in what is today Bulgaria. The Roman Thermae of Varna feature the whole range of facilities including a "apodyterium" (changing room), a "frigidarium" (cold pool), a "tepidarium" (warm pool) and a "caldarium" (hot pool) as well as a "palaestra" (a space with social and athletic functions). Heating was provided by means of a hypocaust, an underfloor heating system of pipes. Roman Thermae (Varna) The Roman Thermae (, "Rimski termi") are a