Built by the Crown of Aragon on the site of a Moorish-era mosque, Palma cathedral is 121 metres long, 55 metres wide and its nave is 44 metres tall.
Designed in the Catalan Gothic style but with Northern European influences, it was begun by King James I of Aragon in 1229 but only finished in 1601. It sits within the old city of Palma atop the former citadel of the Roman city, between the Royal Palace of La Almudaina and the episcopal palace. It also overlooks the Parc de la Mar and the Mediterranean Sea.
Light pours in through the rose window - one of the world's largest, 12m across and studded with 1,236 pieces of stained glass. The columns are ringed with wrought-iron candelabra designed by Gaudi. His most controversial addition is the unfinished Crown of Thorns, fashioned from cardboard and cork and suspended above the altar. Be sure to walk around to the south front, facing the sea, to look at the Portal del Mirador a 15th-century door by Guillem Sagrera featuring scenes from the Last Supper.
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.