The triangular Alcazaba (citadel) with its thick walls and towers was the main form of defence for the Alhambra against attack. This is the oldest part of the Alhambra complex and was the site of the original red castle. It was Mohammed I who built the surrounding walls and the three towers: the Torre de la Vela (Watchtower) in the far-right corner, the Torre Quebrada (the “Broken” Tower) and the Torre del Homenaje (the Keep). A further tower was added subsequently: the Torre de la Pólvora (the "Gunpowder" Tower). Work on the palaces began later and the Sultan lived here until they were finished. In the photo on the left, you can see the Torre de la Vela with its flags and belltower and the citadel.