 Nyora kuenderera mberi kweiyi ndima - Urwu ndirwo runyorwa rwevatongi veTrapezuntine kubva pakuvambwa kweHumambo hweTrebizond muna 1204 kusvika kudonha kwayokuUmambo hweOttoman muna 1461. Madzimambo eTrapezuntine akatonga Trebizond muchiGiriki: Trapezus, imwe yenyika nhatu dzechiByzantine dzechiGiriki dzaiti dzinotonga zvakananga Umambo hweByzantine, hwakanga hwatorwa neHumambo hwechiLatin mumashure meHondo yeChipiri yeCrusade. Pakati penyika nhatu, Umambo hweNicaea hwakabudirira kudzinga madzimambo echiLatin muna 1261 uye kudzorera Umambo hweByzantium pasi pemhuri yaPalaiologos. Humambo hweTrebizond hwaizouya kuzogara kwenguva refu kupfuura Humambo hwakadzorerwa hwakanga hwakavakirwa muConstantinople, uye hwakaramba huchishandisa zita roumambo, kunyange zvazvo rakanga rachinja zvishoma, kusvikira raparara. 