| gptkbp:instanceOf | gptkb:ancient_city 
 | 
                        
                            
                                | gptkbp:associatedWith | gptkb:Roman_emperors Roman legions
 Roman provinces
 Roman cities
 
 | 
                        
                            
                                | gptkbp:builtBy | gptkb:Romans 
 | 
                        
                            
                                | gptkbp:elevation | 2 to 10 meters 
 | 
                        
                            
                                | gptkbp:feature | gptkb:castle gates
 ditches
 ramparts
 battlements
 
 | 
                        
                            
                                | gptkbp:location | gptkb:Roman_Empire 
 | 
                        
                            
                                | gptkbp:material | gptkb:brick gptkb:stone
 
 | 
                        
                            
                                | gptkbp:notableExample | gptkb:Hadrian's_Wall gptkb:London_Wall
 gptkb:Aurelian_Walls
 gptkb:Servian_Wall
 
 | 
                        
                            
                                | gptkbp:period | gptkb:Imperial_Rome gptkb:Republican_Rome
 
 | 
                        
                            
                                | gptkbp:purpose | defense 
 | 
                        
                            
                                | gptkbp:relatedTo | Roman forts Roman roads
 Roman engineering
 Roman military architecture
 
 | 
                        
                            
                                | gptkbp:startDate | 4th century BC to 5th century AD 
 | 
                        
                            
                                | gptkbp:survivingRemains | gptkb:Britain gptkb:France
 gptkb:Germany
 gptkb:Israel
 gptkb:Italy
 gptkb:North_Africa
 gptkb:Spain
 gptkb:Syria
 gptkb:Turkey
 
 | 
                        
                            
                                | gptkbp:technique | gptkb:opus_caementicium gptkb:opus_incertum
 gptkb:opus_quadratum
 opus reticulatum
 
 | 
                        
                            
                                | gptkbp:thickness | 1 to 6 meters 
 | 
                        
                            
                                | gptkbp:UNESCOWorldHeritageSite | gptkb:Hadrian's_Wall gptkb:Aurelian_Walls
 gptkb:Servian_Wall
 
 | 
                        
                            
                                | gptkbp:usedFor | gptkb:castle city defense
 border defense
 
 | 
                        
                            
                                | gptkbp:bfsParent | gptkb:Fano,_Italy 
 | 
                        
                            
                                | gptkbp:bfsLayer | 6 
 | 
                        
                            
                                | https://www.w3.org/2000/01/rdf-schema#label | Roman Walls 
 |