Byzantine–Venetian Trade Dispute

Name: Byzantine–Venetian Trade Dispute
Start: 1157

Type Event Region Constantinople Time 1157

Around 1157, Byzantine Emperor Manuel I granted trade privileges to Genoa, Pisa, and other Italian city-states, provoking strong Venetian resentment …

Timeline

1157Constantinople · Byzantine EmpireManuel continued policies supporting Genoa and Pisa to counterbalance Venice; Venetian envoys and merchants protested in the imperial capital, accusing the empire of abandoning existing commercial privilege arrangements.
1157Adriatic Sea · Adriatic SeaVenice and Byzantine-supported port cities such as Ancona clashed repeatedly over shipping and tariffs; relations deteriorated but full-scale war did not immediately break out.

Sources

Venice in the Twelfth Century — Paul Magdalino https://www.cambridge.org/core/books/byzantium-venice-and-the-medieval-adriatic/venice-in-the-twelfth-century/A771358DBE98C5AB7E8CBF284CDEFA5B
Handel und Politik zwischen dem byzantinischen Reich und den italienischen Kommunen Venedig, Pisa und Genua — Ralph-Johannes Lilie (1984)