Semi-Lunar Tower
Like the Double tower the Semi-Lunar tower is a flanking or "on the wall tower". The purpose of these towers was to make the sectioning of the wall easier and so contain the attackers who got on to it. Because the tower rose well above the wall level it could defend the adjacent wall-walk and act as a lookout and signaling post.
The tower is vaulted at both the first floor level and at battlement level with no connecting stairs. The tower probably dates from the thirteenth century but was substantially altered towards the end of the medieval period to accommodate artillery.
The Beach Tower
The beach tower is a 15th century building. It is one of the finest towers on the local walk through the town. It was built on a rocky outcrop which forms a natural defensive position. During the medieval period the area between the tower and the river was not developed.
The tower commands a fine view of the River Suir in particular it commanded a superb view of the up river approaches to the city. From the upper battlements you can see Grannagh Castle located up the banks of the river Suir.
Turgesius's Tower
The tower was located roughly where the A.I.B Bank stands at the intersection of Barronstrand St. and the Quay. At this point the wall continued east up the Quay to Reginalds Tower and South to St. Martins Gate. Both these stretches of wall together with there gates and towers were demolished during the eighteenth century.
Interestingly excavations along the line of the wall revealed that even where the wall has been removed its influence is not lost because in the older parts of the city the street pattern still reflects the line of the city wall.