The dome is not impressive only because it is large. Its real achievement is the way a huge circular canopy appears to float above a broad, unified interior.
Pendentives
Curved triangular pendentives transition from the square bay below to the circular base of the dome, allowing the load to move toward four major piers.
Light
Windows at the base of the dome visually break up its mass, creating the famous impression of a canopy suspended in light.
A history of repair
Earthquakes and structural movement have repeatedly affected the dome. The form visitors see today is the result of many centuries of repair, not a perfectly untouched sixth-century shell.
Current restoration
Recent conservation has focused heavily on seismic safety, roof covering and the dome structure, so scaffolding can be part of the visitor experience.
This independent guide uses official Turkish cultural sources and UNESCO references. Visitor access, restoration conditions and prices can change; verify practical details before you go.