Thomas A. Carlson (eds.), "Mar Petion" in The Beth Qaṭraye Gazetteer last modified January 10, 2020, https://bqgazetteer.bethmardutho.org/place/2479
    
        
            
                
                    Mar Petion
                    Dayr
                        al-ʿAtīqa
                    Mār
                        Peṯiōn
                    Dayr al-Atīqa
                    Dayr al-‘Atīqa
                    الدير العتيق
                    A monastery in Baghdad, sometimes the
                        residence of the Catholicos of the Church of the East.
                    
                        Baghdad
                    
                    
                        Attestation of name الدير
                                العتيق in the Kitāb
                                al-buldān of Aḥmad ibn Abī Yaʿqūb
                                al-Yaʿqūbī.
                        
                    
                    
                    https://bqgazetteer.bethmardutho.org/place/2479
                    http://syriaca.org/place/2479
                    
                        The Gorgias Encyclopedic Dictionary of the
                            Syriac Heritage
                        
                        50
                    
                    
                        David Wilmshurst
                        The Ecclesiastical Organisation of the Church
                            of the East, 1318-1913
                        
                        183
                    
                    
                        Kitāb al-buldān
                        Aḥmad ibn Abī Yaʿqūb al-Yaʿqūbī
                        
                        235