| gptkbp:instanceOf | gptkb:monarchy 
 | 
                        
                            
                                | gptkbp:attendedBy | gptkb:Council_of_Florence 
 | 
                        
                            
                                | gptkbp:birthDate | 1392 
 | 
                        
                            
                                | gptkbp:burialPlace | gptkb:Pantokrator_Monastery,_Constantinople 
 | 
                        
                            
                                | gptkbp:coronationDate | 19 January 1425 
 | 
                        
                            
                                | gptkbp:deathDate | 31 October 1448 
 | 
                        
                            
                                | gptkbp:dynasty | gptkb:Palaiologos 
 | 
                        
                            
                                | gptkbp:father | gptkb:Manuel_II_Palaiologos 
 | 
                        
                            
                                | gptkbp:house | gptkb:Palaiologos 
 | 
                        
                            
                                | gptkbp:mother | gptkb:Helena_Dragaš 
 | 
                        
                            
                                | gptkbp:noChildren | true 
 | 
                        
                            
                                | gptkbp:notableEvent | witnessed the decline of the Byzantine Empire 
 | 
                        
                            
                                | gptkbp:notableFor | attempts to unite Eastern Orthodox and Roman Catholic Churches 
 | 
                        
                            
                                | gptkbp:placeOfBirth | gptkb:Constantinople 
 | 
                        
                            
                                | gptkbp:placeOfDeath | gptkb:Constantinople 
 | 
                        
                            
                                | gptkbp:portrait | gptkb:Benozzo_Gozzoli 
 | 
                        
                            
                                | gptkbp:predecessor | gptkb:Manuel_II_Palaiologos 
 | 
                        
                            
                                | gptkbp:reignEnd | 1448 
 | 
                        
                            
                                | gptkbp:reignStart | 1425 
 | 
                        
                            
                                | gptkbp:religion | gptkb:Eastern_Orthodox_Christianity 
 | 
                        
                            
                                | gptkbp:sibling | gptkb:Constantine_XI_Palaiologos gptkb:Andronikos_Palaiologos
 gptkb:Demetrios_Palaiologos
 gptkb:Theodore_II_Palaiologos
 gptkb:Thomas_Palaiologos
 
 | 
                        
                            
                                | gptkbp:spouse | gptkb:Anna_of_Moscow gptkb:Maria_of_Trebizond
 gptkb:Sophia_of_Montferrat
 
 | 
                        
                            
                                | gptkbp:successor | gptkb:Constantine_XI_Palaiologos 
 | 
                        
                            
                                | gptkbp:title | Emperor and Autocrat of the Romans 
 | 
                        
                            
                                | gptkbp:bfsParent | gptkb:Ioannes 
 | 
                        
                            
                                | gptkbp:bfsLayer | 5 
 | 
                        
                            
                                | https://www.w3.org/2000/01/rdf-schema#label | Ioannes VIII Palaiologos 
 |