During the High Middle Ages, the insignia was used to mark the entrances of Assassins' Bureaus and could be seen on the banners decorating the fortress of Masyaf. During the Renaissance in Italy, it was used on the mechanisms in the many Assassin Tombs and on the banners and walls of Monteriggioni. It was also displayed on the banners hung in the Tiber Island headquarters. In Constantinople, Assassin Dens and ziplines had a small Assassin insignia atop them, while Bomb-crafting stations were all painted with the Turkish Assassins' own insignia.