When is Assassins Creed set

Assassin's Creed: Around the time of the 3rd Crusade, 1191-1193.
Assassin's Creed II: Italian Renaissance, 1459-1499.
Assassin's Creed: Brotherhood: Italian Renaissance, 1499-1507
Assassin's Creed: Revelations: European Renaissance, 1511-1513