Which territories did Venice gain after Constantinople was captured in 1204?

Following the capture and sack of Constantinople in 1204 during the Fourth Crusade, Venice secured a vast commercial empire in the eastern Mediterranean through the partition of Byzantine Empire territories.1

Venice acquired several strategic holdings, including:

• Major Islands: Most notably Crete, which became a central part of their maritime domain.12
• Aegean Territories: Venice gained control over many Aegean islands and parts of Euboea. Much of the southern Aegean region came under Venetian authority following the crusade.12
• Mainland Infrastructure: The Republic established valuable trading stations and fortified lookout posts along the Greek mainland.1

As a result of these acquisitions, the Venetian doges adopted the title of Lord of One-Quarter and One-Eighth of the Entire Byzantine Empire. Additionally, a special magistrate was appointed from Venice to administer the significant Venetian colony established within Constantinople itself.1