Located at 1600 Pennsylvania Avenue NW in Washington, D.C., the White House is the official residence and principal workplace of the President of the United States. It was designed by Irish-born James Hoban and built between 1792 and 1800 of white-painted Aquia sandstone. During the War of 1812 British troops burned it in retaliation for an earlier burning of Canadian government buildings in York, Ontario, by the United States.
The Washington Monument, located in Washington, D.C., was built to commemorate General George Washington, the first president of the USA. When completed in 1848 it was the world’s tallest stone structure until the completion of the Eiffel Tower in Paris in 1889.
The Leaning Tower of Pisa, known worldwide for its unintended tilt to one side, is the freestanding bell tower of the cathedral in the Italian city of Pisa. Work on the ground floor of the white marble campanile began on August 8, 1173.
The Sydney Opera House is a multi-venue performing arts center in Sydney, New South Wales, Australia. The Opera House design is the creation of Danish Architect, Jorn Utzon who took a particular interest in the works of American architect Frank Lloyd Wright.