The Cathedral of Astorga edifice was begun in 1471, within the same walls of its Romanesque predecessors from the 11th-13th centuries. The construction lasted until the 18th century, thus to its original Gothic style appearance were added elements from later styles, such as the Neo-Classicist cloister (18th century), the Baroque towers, capitals and the façade, and the Renaissance portico.
The interior houses numerous artworks, such as the Flemish-Spanish retablo of St. Michael, and the large high altar by Gaspar Becerra (1558), considered a masterwork of the Spanish Renaissance sculpture. Other sculptures include the Purísima by Gregorio Fernández (1626), St. John the Baptist and St. Jerome by Mateo del Prado (17th century) and the Christ of the Waters (14th century).
Next to the church is the Neo-medieval Episcopal Palace, designed by Antoni Gaudí.
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.