The immaculately-looking white neoclassical palace on the Spreeweg, just off the Tiergarten’s northwestern corner is the official residence of the German President. The palace was erected in 1786 as a private residence for Friedrich the Great’s youngest brother Prince Ferdinand of Prussia as three-winged palace ideally situated on the Tiergarten hunting grounds. It was designed by architect Philipp Daniel Boumann. Over the centuries it became a school under Kaiser Wilhelm II (1888 – 1918) – the last German Kaiser – and a Reich guesthouse in 1939. The round arched windows of the side wings were converted from the original side entrances. The present building is the 1959 reconstructed version and only one room the Oval Saal (Oval Office) from Carl Gotthard Langhans is original. The President’s offices are located in the new building, the Bundespräsidialamt, south of the Palace, a contrasting glass and black granite edifice under heavy guard.
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.