Aquae Calidae, Bulgaria Aquae Calidae, Bulgaria Aquae Calidae (Latin for warm waters), also known as Therma and Thermopolis in the Middle Ages, was an ancient town in Thrace located in the territory of today's Bulgarian port city of Burgas. It was built around thermal baths using the hot springs and became one of the most important spa centres of ancient times. The site and baths of Aquae Calidae have been visited in the course of history by several important rulers from Philip II of Macedon to the Eastern Roman emperors Justinian I and Constantine IV, the Bulgarian ruler Terwel and the Ottoman Sultan
Roman bridge on Ilidža Roman bridge on Ilidža The Roman bridge on Ilidža (Bosnian, Croatian and Serbian: "Rimski Most" / Римски мост) is a bridge located in Sarajevo, Bosnia and Herzegovina. It was built in the 16th century using actual Roman stones and crosses the Bosna river. The Roman Bridge is located not far from Vrelo Bosne on the Bosna river in the Ilidža municipality, which was built sometime between 1530 and 1550 from the original Roman stones and ruins of the bridge that stood there during the Roman period used to connect the Romans with the village of Aquae Sulphurae at the time.