The northern section of the Academy Park, on Studentski Trg, was excavated in 1968 during the building of a furnace oil tank for the boiler room of the Belgrade's City Committee of the League of Communists located nearby. Under the lawn, the remnants of the ancient Roman thermae were discovered, including the frigidarium (room with the cold water), laconicum (room with the warm water where people would sweat and prepare) and caldarium (room with the two pools of hot water). The site became an archaeological dig in 1969 and 8 rooms in total were discovered, including the remains of the brick furnace which heated the water. It was a public unisex bath dated to 3rd or 4th century. The entire area of the park is actually within the borders of the "Protected zone of Roman Singidunum". It is situated in the area that used to be the civilian sector of the city, outside the fortress. The remnants were visible until 1978 and due to the lack of funds to continue excavations or to cover it with the roof or a marquee, the remains were conserved and buried again. Remains of another thermae on the nearby Faculty of Philosophy Plateau are still visible and used as benches.