The Duomo (Cathedral) of Enna, a notable example of religious architecture in Sicily, was built in the 14th century by queen Eleonora, Frederick III's wife. It was renovated and remodeled after the fire of 1446. The great Baroque facade, in yellow tufa-stone, is surmounted by a massive campanile with finely shaped decorative elements. The portal on the right side is from the 16th century, while the other is from the original 14th-century edifice. The interior has a nave with two aisles, separated by massive Corinthian columns, and three apses. The stucco decoration is from the 16th and 17th centuries. Art works include a 15th-century crucifix panel painting, a canvas by Guglielmo Borremans, the presbytery paintings by Filippo Paladini (1613), and a Baroque side portal. The cathedral's treasure is housed in the Alessi Museum, and includes precious ornaments, the gold crown with diamonds known as the 'Crown of the Virgin,' Byzantine icons, thousands of ancient coins, and other collections.
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.