In the Battle of Meloria in 1284 Porto Pisano was blockaded by the Genoese fleet, and Pisa suffered a heavy defeat, which eventually resulted in its decline. Subsequently, Porto Pisano was controlled by Genoa. On August 28, 1421, the port was sold to Florence which has chosen to use Livorno as its principal seaport, since Porto Pisano suffered from increasing alluvial deposits, and the coastline had moved away from the port. After the 16th century, it ceased entirely to be used.