Maarjamäe or Orlov’s Palace was commissioned by Count Anatoli Orlov-Davydov from St. Petersburg. The historicist limestone summer residence on the seashore was designed by architect Robert Gödicke. In the 1930s the building housed a magnificent restaurant – the Riviera Palace. In 1937 the Estonian Air force Flying School obtained the building, the Soviet Army took over in 1940. The restored palace opened its doors to the public as a branch museum of the Estonian History Museum in 1987. Today it holds permanent and temporary exhibitions about Estonian history.
Reference: Viroweb
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.