The older lighthouse of Suurupi was built in 1760. The round old-style stone tower was built near the end of the reign of Czarina Elizaveta Petrovna, this is a magnificent example of classic Russian Imperial lighthouse design. The lighthouse was substantially rebuilt in 1812 and further renovated in 1858. The round watch room was added in 1951, and the present lantern was new in 1998.
The newer wooden lighthouse date back to the year 1859. It is 15 m high, square pyramidal, 4-story wood keeper's house with A-frame roof and painted in white. The light was formerly shown through a window on the top floor at one end of the building; it has been moved outside to the windowsill. A miraculous survivor of two world wars and over 150 winters, this remarkable lighthouse is a well-known historic landmark on Estonia's coastline. The top floor with its lantern chamber was added in 1885, increasing the tower height by 3.5 m.
Reference: Lighthouses of Northern Estonia
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.