Pisan troops were among the first to conquer Jerusalem in 1099, and were led by their archbishop, Dagobert, the future Latin Patriarch of Jerusalem. With significant presences in the Levant, in the Byzantine Empire and in the Crusader states of Palestine, particularly in Constantinople (where the Byzantine Emperor Alexius I Comnenus granted them special mooring and trading rights), Antioch, Latakia, Tyre, Acre, Jaffa, Tripoli, Alexandria and Cairo. In all these cities the Pisans were granted privileges and immunity from taxation, but had to contribute to their defence in case of attack. In the 12th century the Pisan quarter in the eastern part of Constantinople had grown to 1,000 people. The well-known "Società dei Vermigli" was established in Tyre and was reported in the defense of the city against the attack by Saladin in 1187.