Passage: The Golden Horn was a natural port, particularly the Eminönü/Sirkeci shore, which being on a peninsula was also eminently defensible. It was this location that led to the foundation of Byzantium, and from here that the city grew, with the oldest neighborhoods being the port districts along the Golden Horn. In the 12th century, the Byzantine port was also occupied by merchants from Venice, Amalfi, Genoa and Pisa, who eventually acquired their own wharfs and waterfront districts.

Question: Merchants from where occupied the port in the 12th century?
Venice, Amalfi, Genoa and Pisa