Pedzisa mutsara unotevera: Mhanza yeguta yakawedzera zvikuru apo yakabatana neFirst Crusade: kubatanidzwa kwayo kwakaunza maropafadzo makuru kuvagari veGenoa, avo vakatamira kunzvimbo dzakawanda muNyika Tsvene. Kukwirira kwepfuma yeGenoese kwakauya muzana ramakore rechi 13 nokupedzwa kweChibvumirano cheNymphaeum (1261) namambo weByzantine Michael VIII Palaeologus. Mukutsinhana nokubatsira vaByzantine kukundazve Constantinople, izvi zvakatungamirira kukudzingwa kwavaVenetian kubva mumigero yaitungamirira kuGungwa Dema, iro rakakurumidza kuva gungwa reGenoa. Nokukurumidza pashure pacho, muna 1284, Pisa pakupedzisira yakakundwa mu
Hondo yeMeloria neGenoa Navy.