ni akoole ninu ISO 3166-2, apa opagun ISO 3166 ti International Organization for Standardization (ISO) tejadesiwe to setumo awon amioro fun oruko awon ipinsabe koko awon orile-ede.ItokasiISO 3166.. 
The Empire received a mortal blow in 1204 from the fourth crusade, when it was dissolved and Divided into àjàràting Byzantine Greek and Latin realms.. 