The Ecumenical Patriarchate of Constantinople: Hagia Sophia
- A history and description of this great Byzantine church. Illustrations include lithographs from Aya Sofia Constantinople (1852), a floor plan, isometric elevation, and cross-sections. Exterior and interior photographs include mosaics.
- http://www.patriarchate.org/ecumenical_patriarchate/chapter_4/html/hagia_sophia.html

Wikipedia: Hagia Sophia
- An illustrated history and description from the online collaborative encyclopedia of the magnificent Byzantine Church of Holy Wisdom, now known as the Ayasofya Museum.
- http://en.wikipedia.org/wiki/Hagia_Sophia

Wikipedia: Suleiman Mosque
- Illustrated history and description from the online collaborative encyclopedia of this grand mosque in Istanbul, built on the order of Suleiman I to a design by Sinan which reflected the nearby Hagia Sophia.
- http://en.wikipedia.org/wiki/Suleymaniye_Mosque

Wikipedia: Chora Church
- Article describing a building in Istanbul considered to be one of the most beautiful examples of Byzantine architecture, now a museum.
- http://en.wikipedia.org/wiki/Chora_Church

Byzantium 1200
- A non-profit project creating computer reconstructions of the Byzantine monuments of Constantinople (now Istanbul) as they stood in 1200 AD.
- http://www.byzantium1200.com/

Hagia Sophia
- Great Buildings Online provide photographs, 3D model, choice quotations and bibliography of the Byzantine masterpiece designed by Isidoros and Anthemios in 532-7.
- http://www.greatbuildings.com/buildings/Hagia_Sophia.html

On the Great Church
- Description by Procopius in 537 of the Hagia Sophia in Constantinople. Taken from the Lethabv/Swainson translation of De Aedificiis.
- http://gbgm-umc.org/umw/bible/procopius.stm

Computer Model of the Hagia Sophia
- Project by Princeton University in 1996. Technical details of producing the model, some photographs.
- http://www.princeton.edu/~asce/const_95/const.html

Beyazit Tower
- Deniz Kaya's illustrated article on the stone firemen's watch tower in Istanbul, built in 1828. From Mersina.
- http://www.mersina.com/Turkey/Marmara/Istanbul/beyazit_tower.html

Mansions on the Water - Yalis of Istanbul
- An illustrated article by Chris Hellier in Mersina on the grand houses on the Bosphorus shore, built by the former Ottoman elite.
- http://www.mersina.com/lib/yali/index.html