Burnum Burnum ( ; 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 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 ) . History . The Roman writer Plinius wrote about Burnum , as " " fortress distinguished in wars . " - " In hoc tractu sunt Burnum , Andetrium , Tribulium nobilitata proeliis castella . " " The Pagana chart from the 16th century presented marked traits of Burnum as the ancient locality , but it did not reach archeological interest until the 19th century , when it occupied the attention of renowned Croatian archaeologists , father Lujo Marun and father Frane Bulić . The first excavations were conducted by Austrian archeologists . It is assumed that Burnum originates from the year 33 BC , but it is more likely that it was established a few decades later . Several Roman legions were located there in succession , and the first one was legio XX Valeria Victrix , placed already there in the beginning of the Pannonian uprising ( " Bellum Batonianum " ) AD 6 - 9 . The reason for its location was the need for the control of traffic around the Krka River . Building was initiated by the Roman governor for Dalmatia Publius Cornelius Dolabella and continued by the Roman Emperor Tiberius Claudius Caesar Augustus Germanicus . The camp gained its final shape during the reign of Claudius around 50 AD Legio XI Claudia " Pia Fidelis " left the camp some times between AD 42 and 67 , probably AD 56 - 57 and was succeeded by Legio IIII Flavia Felix . According to some sources , a rebellion of Lucius Arruntius Camillus Scribonianus against the emperor Claudius AD 42 was started at this camp as well . After the last Roman legions had left the camp , it developed into a settlement of urban type . The camp was completely destroyed when the emperor Justinian attempted to take it back from the Ostrogoths in the 6th century . Aqueduct . The Burnum aqueduct is entirely underground , so that water stayed cool in the summer and could not freeze in the winter . It is about 32 . 6 kilometers long . 170m height - difference are between the source and the town . It flowed 86 liters per second . The location is only partially archaeologically investigated . A pre - Roman Liburnian builder can not be excluded at the moment in accordance with previous studies . Legends . There are two old legends about the construction of this aqueduct . The first story is : " Two men courted a woman . One man should build a town , the other man should build an aqueduct to this town . And who would be first , he would receive her as his wife . Both done simultaneously , but that one , who had built the town , judged , that his town was not finished yet , and so the other one should marry her . With the earth , which was dugged out at the building of the aqueduct , was built a hill and on the hill a village . The name of that one , who built the aqueduct , was Rade and so is the village also called Radučka glavica . " Another old legend about this aqueduct is : " Selemnus , a beautiful young shepherd in those parts , was beloved by Argyra , the Nymph , from whom the town and fountain of that name were called ; but the flower of his age being over , the Nymph deserted him , upon which he pined away , and was transformed into a river by Venus ; after this he still retained his former passion , and for some time conveyed his waters , through a subterraneous passage , to Argyra ' s fountain . And because they both had separated , but those story was never forgotten , the names remained in memory in Argyra and Selemnos near Korinth and in Argyruntum and Zrmanja . So the aqueduct stayed in memory . The major harbour of Liburnian navy since 5th century BC was Corynthia at eastern cape of Krk island . "