during the 3rd and 4th centuries the northern wall was rebuilt and improved by the byzantines leaving no trace or record of a gate in this sector of the fortification. while there is no information about a gate preexisting at this point in the wall before the city was occupied by the crusaders, there is a suggestion that they maintained a small postern gate, named after st. lazarus, just east of the ottoman construction for the use of troops stationed at tancred's tower (goliath's tower). uncovered during drainage and sewage works in the area, it may have also been used by the knights of the leper's order also quartered there. early records of the crusades suggest the wall was breached after the crusader occupation on the orders of tancred the gate may well have been, with the tower subsequently named after him. the breach may have been later converted into a gate.