| gptkbp:instanceOf | gptkb:historical_period 
 | 
                        
                            
                                | gptkbp:archaeologicalSite | gptkb:Habuba_Kabira gptkb:Warka_(Uruk)
 gptkb:Godin_Tepe
 gptkb:Tell_Brak
 Tell Uqair
 
 | 
                        
                            
                                | gptkbp:characterizedBy | gptkb:urban_development monumental architecture
 development of writing
 mass production of pottery
 
 | 
                        
                            
                                | gptkbp:culture | Sumerian 
 | 
                        
                            
                                | gptkbp:economy | agriculture trade
 craft production
 
 | 
                        
                            
                                | gptkbp:endDate | c. 3100 BCE 
 | 
                        
                            
                                | gptkbp:followedBy | gptkb:Jemdet_Nasr_period 
 | 
                        
                            
                                | gptkbp:language | Sumerian 
 | 
                        
                            
                                | gptkbp:locatedIn | gptkb:Mesopotamia 
 | 
                        
                            
                                | gptkbp:majorCity | gptkb:Uruk gptkb:Eridu
 gptkb:Kish
 gptkb:Lagash
 gptkb:Nippur
 
 | 
                        
                            
                                | gptkbp:namedAfter | gptkb:Uruk 
 | 
                        
                            
                                | gptkbp:notableFor | gptkb:Beveled_rim_bowls Cylinder seals
 Ziggurat construction
 earliest cuneiform writing
 
 | 
                        
                            
                                | gptkbp:precededBy | gptkb:Ubaid_period 
 | 
                        
                            
                                | gptkbp:religion | gptkb:mythology 
 | 
                        
                            
                                | gptkbp:significantEvent | invention of writing rise of city-states
 expansion of Uruk culture
 
 | 
                        
                            
                                | gptkbp:startDate | c. 4000 BCE 
 | 
                        
                            
                                | gptkbp:writingSystem | proto-cuneiform 
 | 
                        
                            
                                | gptkbp:bfsParent | gptkb:Uruk 
 | 
                        
                            
                                | gptkbp:bfsLayer | 6 
 | 
                        
                            
                                | https://www.w3.org/2000/01/rdf-schema#label | Uruk period 
 |