Republic of Constantinople (Premysloides Dynasty)

Background
Sack of Constantinople in Winter 1468/1469 had deep impact on morale of Roman Empire. It revealed weakness of defense of capital city, heart and mind of Empire. It revealed that Empire have enough capabilities to defend borders, secure safety and protection in provinces, but can not effective secure defense of Constantinople, despite presence of Imperial Family, despite it is largest and most imporant imperial city.

While Mamluk invaders were defeated and executed, popular rebellion provoked by dissatisfied senators (most of them would be inspiration for later Interregnum Senate), forced imperial reinforcements leave Constantinople and declared short-lived Republic of Constantinople.