Kosmos maps the eleven centuries of the Eastern Roman Empire — from the foundation of Constantinople in 330 to its fall in 1453 — as a living historical landscape. Drag the timeline and the map itself changes: cities rise, fall, and change their names; borders move; sees are founded and lost.
Layers — choose what the map shows: settlements by class, fortifications, roads, territories.
Places — click anything on the map for its full record: history, archaeology, population, churchmen, sources.
Politeia — who wore the purple in the year you are looking at, and who held the offices of the state beneath the emperor.
Chronicle — what the sources record happening around that year.
Every date, figure and boundary carries its evidence — open a place’s record and its sources are listed at the bottom.