The Gothic-style structure is especially identified for its temple-like aesthetic and its affiliation with non-secular systems.
An inspiration to architects all over the world, the Pantheon roof remains the world's largest unreinforced concrete dome.
Originally known as Buckingham House, George III bought the property in 1735 when the mansion was little more than a red brick house.
Once a church, later a mosque, and now a museum, Hagia Sophia is an architectural masterpiece.
The Sydney Opera House is widely regarded as one of the greatest architectural works of the 20th century.
The Taj Mahal is regarded as one of the finest examples of Mughal architecture – an amalgamation of Persian, Turkish, and Indian styles.
The Colosseum stadium was capable of seating at least 50,000 spectators and was used mainly for gladiatorial games.
This futuristic building looks like it belongs in a sci-fi movie rather than Lime Street in London.
The tower began to lean during construction after soft ground on one side was unable to properly support the structure's weight.
The Leaning Tower of Pisa began in 1173 and went on for over a whopping 199 years.