Almenar castle was built in the 15th century over the remains of an older castle that can still be seen today. It originally belonged to the Bravo de Laguna and Saravias y Ríos families, and till this day you can still see their coat of arms on the castle’s walls. It has a double-wall enclosure: in the interior one you can find the Keep and the weapon courtyard, and in the exterior one, you can see the defensive walls surrounding a moat with a drawbridge. Antonio Machado’s wife, Leonor Izquierdo was born in this castle on June 12th, 1894, when it was used as the Guardia Civil barracks. Two of Gustavo Adolfo Bécquer’s stories are set in this castle.
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.