The Zagreb Cathedral is the tallest building in Croatia. It is dedicated to the Assumption of Mary and to kings Saint Stephen and Saint Ladislaus. The cathedral is typically Gothic, as is its sacristy, which is of great architectural value. Its prominent spires are considered to be landmarks as they are visible from most parts of the city.
In 1093 when King Ladislaus (1040-1095) moved the bishop's chair from Sisak to Zagreb, he proclaimed the existing church as a cathedral. Construction on the cathedral started shortly after his death and was finished in 1217 and consecrated by king Andrew II of Hungary. The building was destroyed by the Mongols in 1242 but rebuilt by bishop Timotej (1263-1287) a few years later. At the end of the 15th century, the Ottoman Empire invaded Croatia, triggering the construction of fortification walls around the cathedral, some of which are still intact. In the 17th century, a fortified renaissance watchtower was erected on the south side, and was used as a military observation point, because of the Ottoman threat.
The cathedral was severely damaged in the 1880 Zagreb earthquake. The main nave collapsed and the tower was damaged beyond repair. The restoration of the cathedral in the Neo-Gothic style was led by Hermann Bollé, bringing the cathedral to its present form. As part of that restoration, two spires 108 m high were raised on the western side, both of which are now in the process of being restored as part of an extensive general restoration of the cathedral.
When facing the portal, the building is 46 meters wide and 108 meters high. The cathedral contains a relief of Cardinal Aloysius Stepinac with Christ done by the Croatian sculptor Ivan Meštrović. The cathedral was visited by Pope Benedict XVI on 5 June 2011 where he celebrated Sunday Vespers and prayed before the tomb of Blessed Aloysius Stepinac.
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.