From the Alcazaba, descend in a northward direction through the Barranco de la Hoya, a line of wall that reaches San Cristobal Hill was built during the time of King Jairán (1012-1028) in the eleventh century. Here are the remnants of the neighbourhood amurallamiento musalla, which descends from the hill via the main street Antonio Vico.
On the hill, known in Muslim times as Monte Laham, there are seven towers, three square Muslim towers and four semicircular Christian towers. These were built by the Templars of Alfonso VII, who constructed a strong-chapel following the Christian conquest of the city under the command of the troops of Alfonso VII in 1147.
On this hill, which has an impressive view of the city, and located on a large pedestal, is the image of the Sacred Heart of Jesus, constructed of local Macael marble. It was restored in 2000 and it is said to bless the city and the Mediterranean Sea. It was originally built in the twentieth century (around 1930).
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.