ZADAR, CROATIA—An ancient building with a hypocaust, or central heating system, has been found underneath a site dating to late antiquity and a medieval necropolis in Croatia’s Nature Park Telašćica, which is located on the Dalmatian island of Dugi otok. Total Croatia News reports the building was heated with hot air circulated through clay pipes under the floor and through the walls. Archaeologists from the University of Zadar also uncovered pottery, metal tools, and glass objects during the excavation. To read about another discovery in Croatia, go to “Neanderthal Necklace.”