| gptkbp:instanceOf | gptkb:skyscraper 
 | 
                        
                            
                                | gptkbp:address | gptkb:233_South_Wacker_Drive 
 | 
                        
                            
                                | gptkbp:architect | gptkb:Bruce_Graham 
 | 
                        
                            
                                | gptkbp:city | gptkb:Chicago 
 | 
                        
                            
                                | gptkbp:completedIn | 1973 
 | 
                        
                            
                                | gptkbp:country | gptkb:United_States 
 | 
                        
                            
                                | gptkbp:developer | gptkb:Sears,_Roebuck_&_Co. 
 | 
                        
                            
                                | gptkbp:hasElevator | 104 
 | 
                        
                            
                                | gptkbp:hasObservationDeck | gptkb:Skydeck 
 | 
                        
                            
                                | gptkbp:height | 442.1 meters 527 meters
 
 | 
                        
                            
                                | gptkbp:ISO_3166-2_code | gptkb:USCHI 
 | 
                        
                            
                                | gptkbp:latitude | 41.8789 
 | 
                        
                            
                                | gptkbp:location | gptkb:Chicago 
 | 
                        
                            
                                | gptkbp:longitude | -87.6359 
 | 
                        
                            
                                | gptkbp:material | gptkb:glass gptkb:steel
 aluminum
 
 | 
                        
                            
                                | gptkbp:numberOfFloors | 110 416,000 m²
 
 | 
                        
                            
                                | gptkbp:officialName | gptkb:Willis_Tower 
 | 
                        
                            
                                | gptkbp:opened | 1973 
 | 
                        
                            
                                | gptkbp:owner | gptkb:Blackstone_Group 
 | 
                        
                            
                                | gptkbp:renamed | gptkb:Willis_Tower 2009
 
 | 
                        
                            
                                | gptkbp:skydeckFloor | 103 
 | 
                        
                            
                                | gptkbp:skydeckHeight | 412 meters 
 | 
                        
                            
                                | gptkbp:state | gptkb:Illinois 
 | 
                        
                            
                                | gptkbp:structuralEngineer | gptkb:Fazlur_Rahman_Khan 
 | 
                        
                            
                                | gptkbp:style | gptkb:International_Style 
 | 
                        
                            
                                | gptkbp:tallestBuildingIn | 1973-1998 
 | 
                        
                            
                                | gptkbp:usedFor | gptkb:office gptkb:astronomer
 broadcasting
 
 | 
                        
                            
                                | gptkbp:wasTallestBuildingInUS | 1973-2014 
 | 
                        
                            
                                | gptkbp:website | https://www.willistower.com/ 
 | 
                        
                            
                                | gptkbp:bfsParent | gptkb:Willis_Tower 
 | 
                        
                            
                                | gptkbp:bfsLayer | 4 
 | 
                        
                            
                                | https://www.w3.org/2000/01/rdf-schema#label | Sears Tower 
 |