The Emperor William Monument (Kaiser-Wilhelm-Denkmal), near the town of Porta Westfalica, was erected to honour the first German Emperor, William I (1797–1888), by the then Prussian Province of Westphalia between 1892 and 1896 and emerged against the background of a rising German national identity. The monument, which is around 88 metres high, is classified as one of Germany's national monuments.
The architect of this prominent monument was Bruno Schmitz and the sculptor was Kaspar von Zumbusch. Since 2008, the monument has formed part of the Road of Monuments. As a result of its dominant geographical site, it is the most important landmark of the town of Porta Westfalica and of northern East Westphalia.
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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.