Hamm, Jean S. (2010). Term Paper Resource Guide to Medieval History. ABC-CLIO. стр. 39. ISBN978-0-313-35967-5. „Hagia Sophia, or the Church of Holy Wisdom, is one of the world's most spectacular churches, representing not only great beauty, but also masterful engineering.”
„Hagia Sophia: Turkey turns iconic Istanbul museum into mosque”. BBC News. 10. 7. 2020. Приступљено 28. 4. 2022. „President Erdogan stressed that the country had exercised its sovereign right in converting it back to a mosque. He told a press conference the first Muslim prayers would be held inside the building on 24 July.”
Hamblin, William J. (2008). „Arab perspectives on the Fourth Crusade”. Ур.: Madden, Thomas F. The Fourth Crusade: Event, Aftermath, and Perceptions: Papers from the Sixth Conference of the Society for the Study of the Crusades and the Latin East, Istanbul, Turkey, 25-29 August 2004. Society for the Study of the Crusades and the Latin East. Aldershot: Ashgate Publishing, Ltd. стр. 175. ISBN978-0-7546-6319-5. Приступљено 30. 4. 2022.
„Hagia Sophia”. Hagia Sophia | History, Facts, & Significance. Encyclopædia Britannica. Приступљено 28. 4. 2022. „The original church on the site of the Hagia Sophia is said to have been ordered to be built by Constantine I in 325 on the foundations of a pagan temple.”
Dikigoropoulos, Andreas (1964). „The Constantinopolitan Solidi of Theophilus”. Dumbarton Oaks Papers. 18: 353—361. ISSN0070-7546. JSTOR1291219. doi:10.2307/1291219.|access-date= захтева |url= (помоћ)
Sakar, Sonay; Yuksel, Fethi Ahmet; Hoskan, Nihan; Avci, Emine; Avci, Kerim; Erguven, Kubra (20. 3. 2014), „The gpr measurements on hagia sophia's surfaces facing the naos”, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2014, Symposium on the Application of Geophysics to Engineering and Environmental Problems Proceedings, Society of Exploration Geophysicists and Environment and Engineering Geophysical Society, стр. 558, doi:10.4133/sageep.27-200, Приступљено 30. 4. 2022
Poppe, Andrzej (1992). „Once Again concerning the Baptism of Olga, Archontissa of Rus'”. Dumbarton Oaks Papers. 46: 271—277. ISSN0070-7546. JSTOR1291660. doi:10.2307/1291660.|access-date= захтева |url= (помоћ)
Maranci, Christina (септембар 2003). „The Architect Trdat: Building Practices and Cross-Cultural Exchange in Byzantium and Armenia”. Journal of the Society of Architectural Historians. 62 (3): 294—305. JSTOR3592516. doi:10.2307/3592516.|access-date= захтева |url= (помоћ)CS1 одржавање: Формат датума (веза)
Hurbanič, Martin (2019), Hurbanič, Martin, ур., „Conclusion”, The Avar Siege of Constantinople in 626: History and Legend, New Approaches to Byzantine History and Culture, Cham: Springer International Publishing, стр. 339—349, ISBN978-3-030-16684-7, doi:10.1007/978-3-030-16684-7_15, Приступљено 30. 4. 2022
Rydén, Lennart (1974). „The Andreas Salos Apocalypse. Greek Text, Translation, and Commentary”. Dumbarton Oaks Papers. 28: 197—261. ISSN0070-7546. JSTOR1291359. doi:10.2307/1291359.|access-date= захтева |url= (помоћ)
Inalcik, Halil (1969). „The Policy of Mehmed II toward the Greek Population of Istanbul and the Byzantine Buildings of the City”. Dumbarton Oaks Papers. 23/24: 229—249. ISSN0070-7546. JSTOR1291293. doi:10.2307/1291293.
II, Earlier second church ordered by Theodosius; Rufinus, built by architect; Justinian, current Church was ordered by Emperor; Tralles, designed by Greek scientists Isidore of Miletus and Anthemius of. „Exterior, Walls and Architectural Elements”. Приступљено 29. 4. 2022.
Dikigoropoulos, Andreas (1964). „The Constantinopolitan Solidi of Theophilus”. Dumbarton Oaks Papers. 18: 353—361. ISSN0070-7546. JSTOR1291219. doi:10.2307/1291219.|access-date= захтева |url= (помоћ)
Poppe, Andrzej (1992). „Once Again concerning the Baptism of Olga, Archontissa of Rus'”. Dumbarton Oaks Papers. 46: 271—277. ISSN0070-7546. JSTOR1291660. doi:10.2307/1291660.|access-date= захтева |url= (помоћ)
Pritsak, Omeljan (1985). „When and Where was Ol'ga Baptized?”. Harvard Ukrainian Studies. 9 (1/2): 5—24. ISSN0363-5570. JSTOR41036130.|access-date= захтева |url= (помоћ)
Maranci, Christina (септембар 2003). „The Architect Trdat: Building Practices and Cross-Cultural Exchange in Byzantium and Armenia”. Journal of the Society of Architectural Historians. 62 (3): 294—305. JSTOR3592516. doi:10.2307/3592516.|access-date= захтева |url= (помоћ)CS1 одржавање: Формат датума (веза)
Rydén, Lennart (1974). „The Andreas Salos Apocalypse. Greek Text, Translation, and Commentary”. Dumbarton Oaks Papers. 28: 197—261. ISSN0070-7546. JSTOR1291359. doi:10.2307/1291359.|access-date= захтева |url= (помоћ)
Inalcik, Halil (1969). „The Policy of Mehmed II toward the Greek Population of Istanbul and the Byzantine Buildings of the City”. Dumbarton Oaks Papers. 23/24: 229—249. ISSN0070-7546. JSTOR1291293. doi:10.2307/1291293.
Sakar, Sonay; Yuksel, Fethi Ahmet; Hoskan, Nihan; Avci, Emine; Avci, Kerim; Erguven, Kubra (20. 3. 2014), „The gpr measurements on hagia sophia's surfaces facing the naos”, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2014, Symposium on the Application of Geophysics to Engineering and Environmental Problems Proceedings, Society of Exploration Geophysicists and Environment and Engineering Geophysical Society, стр. 558, doi:10.4133/sageep.27-200, Приступљено 30. 4. 2022
Crawford, Peter (2019). Roman Emperor Zeno: The Perils of Power Politics in Fifth-Century Constantinople. Newburyport: Pen & Sword Books. стр. 14. ISBN978-1-4738-5927-2. OCLC1206400173.|access-date= захтева |url= (помоћ)
Dikigoropoulos, Andreas (1964). „The Constantinopolitan Solidi of Theophilus”. Dumbarton Oaks Papers. 18: 353—361. ISSN0070-7546. JSTOR1291219. doi:10.2307/1291219.|access-date= захтева |url= (помоћ)
Poppe, Andrzej (1992). „Once Again concerning the Baptism of Olga, Archontissa of Rus'”. Dumbarton Oaks Papers. 46: 271—277. ISSN0070-7546. JSTOR1291660. doi:10.2307/1291660.|access-date= захтева |url= (помоћ)
Pritsak, Omeljan (1985). „When and Where was Ol'ga Baptized?”. Harvard Ukrainian Studies. 9 (1/2): 5—24. ISSN0363-5570. JSTOR41036130.|access-date= захтева |url= (помоћ)
Rydén, Lennart (1974). „The Andreas Salos Apocalypse. Greek Text, Translation, and Commentary”. Dumbarton Oaks Papers. 28: 197—261. ISSN0070-7546. JSTOR1291359. doi:10.2307/1291359.|access-date= захтева |url= (помоћ)
Inalcik, Halil (1969). „The Policy of Mehmed II toward the Greek Population of Istanbul and the Byzantine Buildings of the City”. Dumbarton Oaks Papers. 23/24: 229—249. ISSN0070-7546. JSTOR1291293. doi:10.2307/1291293.