Graça Convent is one of the oldest convents in Lisbon. According the legend, in 1362 the statue of Our Lady of Grace appeared in the network of a fisherman. The convent part is nowadays used by the army and is not open for visits, but the church is still in use.
Most of the original Graça Church collapsed in the earthquake of 1755, so what you see today is an 18th century baroque monument. Inside it is partly decorated in 16th and 17th century tiles, while outside is Sophia de Mello Belvedere (famous Portuguese poet ) which is one of the city's most popular viewpoints.
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.