The Lincoln Memorial is an American national monument built to honor the 16th President of the United States, Abraham Lincoln. It is located on the western end of the National Mall in Washington, D.C., across from the Washington Monument. The architect was Henry Bacon and the designer of the primary statue was Daniel Chester French.
Dedicated in 1922, it is one of several monuments built to honor an American president. It has always been a major tourist attraction and since the 1930s has been a symbolic center focused on race relations.
The building is in the form of a Greek Doric temple and contains a large seated sculpture of Abraham Lincoln and inscriptions of two well-known speeches by Lincoln, 'The Gettysburg Address' and his 'Second Inaugural Address'. The memorial has been the site of many famous speeches, including Martin Luther King's 'I Have a Dream' speech, delivered on August 28, 1963, during the rally at the end of the March on Washington for Jobs and Freedom.
Since 2010, approximately 6 million people visit the memorial annually.
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.