San Lorenzo was one of the twelve religious buildings commissioned by king Ferdinand III of Castile in the city after its conquest in the early 13th century.
The church occupies the site of a pre-existing Islamic mosque, which in turn had been built above a Visigothic church. It was built between around 1244 and 1300, in a transitional style between Romanesque and Gothic architecture. It has the typical structure of Andalusian churches of the period, featuring a rectangular plan with a nave and two aisles, without transept and an apse.
It has a portico with three slightly ogival arcades, added in the 16th century. The Islamic minaret was converted into a Renaissance bell tower by Hernán Ruiz the Younger. Above the portico is the large Gothic-Mudéjar rose window. The nave has a coffered ceiling in Mudéjar-Renaissance style. The apse has 14th century paintings inspired by the Italian Gothic school, depicting Scenes of the Life of Jesus. There are also figures of saints and prophets with gilt halos, and a decoration imitating Byzantine azulejos. the high altar (17th century) has scenes of the life of St. Lawrence.
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.