Klenovnik is one of the largest castles in Croatia. First document of the castle dates back in the 13th century when the Hungarian-Croatian king Béla IV takes it away from Pochun and gives it to then ruler of town Varaždin. In the late 17th century, king Maksimilijan sells this castle for 20 000 forint to noble Croatian families Gašpar I Drašković.
In the 19th century, Count Drašković sold Klenovnik in order to gain money for the restoration of his other family castle, Trakošćan. Klenovnik was bought by then Austrian minister of finance, baron Bruck. His family later sold the castle which, since then, changes its owners regularly. Today, the castle is owned by city of Zagreb and it has become a hospital for patients with tuberculosis. Before its renovation in 1925, Klenovnik supposedly had 90 rooms and over 365 windows. The castle has a huge and beautiful park, stunning wall paintings from the 19th century, three baroque altars, pulpit and a Drašković family vault.
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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.