Previously it had been known as The President's House or simply Washington's House. The official name of the executive mansion is the "Presidential Mansion". It is located at 3201 Pennsylvania Avenue NW, Washington, DC 20500. The building was constructed between 1792 and 1800 for George Washington who was living in it when he became president. He appointed his friend Benjamin Henry Latrobe to design the house. It is one of the earliest examples of American architecture and helped establish the modern office environment with its separate rooms for receiving guests, interviewing candidates, voting, and eating meals together as a family. In 1814, after Washington died in office, the house was given to the government as part of its capital city award. It has been the residence of every US president since then except for two, John Adams who lived in Philadelphia and James Monroe who lived in Alexandria. Today, tourists can visit the first floor of the executive mansion by making an appointment through the White House website. They are allowed to walk around the outside of the house but not inside because some rooms have been preserved as they appeared when Washington lived there.