Byzantivm sive Costantineopolis Giovanni Andrea Vavassore
The earliest surviving representation of the city post-conquest, and the first of several very similar bird's-eye depictions from the Uskudar (Asian) shore. Possibly itself based on a lost Giovanni Bellini map from 1480, just before Mehmet II's death.
 Constantinopel des Griechischen Keyserthumbs Hauptstatt, im Lande Thracia am Meere Gelegen Sebastian Münster
 Byzantium Nunc Constantinopolis G. Braun, F. Hogenberg
Published as part of a compendium of 546 views of the world's greatest cities, it's hard not to see this map as entirely lifted from Münster's woodcut produced 25 years earlier, with the addition of Suleiman looking Magnificent at the bottom.
 Plan de Constantinople F. Kauffer, I. B. Lechevalier
Franco-German map of 1812 hinting at the pre-modern city, with crude topography.
 Plan de Constantinople C. Stolpe
A very pretty French map showing Muslim, Christian and Jewish quarters, still-extant ruins of the Byzantine harbours on the Marmara side, and the mercurial 'Forum Amastrianorum'.
 Map of Constantinople Frances Elliot
Somewhat hard to read with the Ancient/Byzantine overlaying the 19th c. Ottoman, but nonetheless invaluable as an overview of the old city's imprint on the new.
 Map of Byzantine Constantinople Alexander van Millingen
 The Hebdomon R. Demangel
The known features of the Hebdomon
('the seventh', an area seven Roman miles from the Milion
), most of which have disappeared entirely over the last century, from Demangel, R. (1945), 'Contribution a la Topographie de L’Hebdomon'.
 Istanbul, Area around the Mangana Wolfgang Müeller-Wiener
1970s map outlining the archeological foundations —Ottoman, Byzantine and Greek— around Topkapi and the Great Palace
 Map of 'Notitia Urbis Constantinopolitanae' A. Wilkins
The pre-Justinian city's major features, as mentioned in the c.450 'Notitia Urbis Constantinopolitanae'.
 Commercial Map of Constantinople A. Wilkins
Crude map laying out the Constantinian city's food supply, storage and production.
 NYU: The Byzantine Churches of Istanbul
A map and collection of images collated in 2001. The site is showing its age: many images are tiny, and the map is a clunky black and white scan.
 Monumental Waterworks in Late Antique Constantinople Richard Bayliss
Shows the water system supplying and flowing from the Valens Aqueduct
, 'Bozdogan Kemer'.
 Wikipedia: Byzantine Constantinople Cplakidas
Layers exhaustive collection of sites on an instructive topographic background. I personally take the street grid and forum dimensions with a very big pinch of salt.
Useful for understanding why the city developed the way it did. See, for example, why the Valens Aqueduct
was needed to bridge the elevated north-western entrance to the city to its eastern-most tip.
The History of Byzantium Robin Pierson
The one and only podcast coursing the millenium-long survival, near-collapse, semi-comeback and eventual eclipse of the Ῥωμαῖοι. Thankfully it's exceptional. Thoughtfully narrated, its half-hour segments combine an imperial narrative with social and economic history asides, source discussion and interviews with prominent Byzantine historians.
Byzantine Emporia Ben Duval
Well-researched, original articles on Byzantium and beyond. Ben is the author of 'Midway Through the Plunge', a gripping recounting of Byzantium's fateful chapter under John VI Cantacuzenus.
The Byzantine Legacy David Hendrix
An encyclopedia of Byzantine sites, each with historical and current-day images and well-researched backstory.
Hayal-et Yapılar: Ghost Buildings Cem Kozar
Photo-realistic reconstuctions of some of Istanbul's lost Byzantine and Ottoman buildings, superimposed on modern-day photos of the city.
Travelogues: Istanbul - Bosphorus Ioli Vingopoulou
List of notable 15th-20th c. travel accounts to Constantinople, from where you can explore past attempts to document and map the city's monuments and features.
Beneath the Hagia Sophia Göksel Gülensoy
An extrememely rare look at the legendary tunnels and cisterns beneath the church, publicized by none other than Dan Brown. Will the full documentary
every see the light of day?
Byzantium 1200 A. Tayfun Öner
Astounding visual tours of Constantinople in meticulously rendered 3D. The city never looked this good —and certainly not in 1200— but it's OK to dream.
360° Explore Hagia Sophia BBC
The BBC's 'Ancient Invisible Cities' series applied 3D imaging technology to some of the greatest historical monuments from Cairo, Athens and Istanbul. While not revealing anything new, the Istanbul episode nonetheless provided this interactive 3D render of the city above, around and inside Hagia Sophia.
The Voice of Hagia Sophia Stanford University
Short documentary on the art and acoustic science behind the project to revive the authentic 13th c. sound of Byzantine chant in the Hagia Sophia.
Dumbarton Oaks: Athena Ruby Font
Type like a Byzantine in Latin or Greek with this academic font derived from inscriptions (coins, seals, mosaics and frescoes etc.) found empire-wide, 325-1453.