Now look up at the towers guarding the entrance to Charles Bridge.

His towers guard against the warbands that would harry his lands.

Originally, around 1450, two great fortified towers on both sides of the river guarded a suspension bridge, which was replaced in 1566 by a stone arch bridge.

Two towers guarded the front entrance.

I say . . . oh, guard the tower.

In the Roman era, a fortified tower guarded the crossing of two Roman roads that met at the site of Luxembourg city.

Guarding the other side is tower 9, which has a square base reinforced by an eight-sided foundation.

Twin towers guarded an open gate set a little to the left of Recusante's course.

A tower of 8 floors guarded by the Minotaur, with the topmost story being the entrance to the palace and site of the city of Mikon.

The medieval tower guarded the gate and a water reservoir.