Burnum (/ˈbɜːrnəm/; or Burnum Municipium), an archaeological site, was a Roman Legion camp and town. It is located 2.5 km north of Kistanje, in inland Dalmatia, Croatia. The remains include a praetorium, the foundations of several rooms, the amphitheatre and the aqueduct.
Burnum is also popularly called Hollow Church (Šuplja Crkva) and is one of many ruins in the Balkans identified in folklore as Traianus' Town (Trojanov Grad). Only two of the original five arches have been preserved (at the end of the 18th century Alberto Fortis mentioned three of them).(Wikipedia)