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Washington, D.C., formally the District of Columbia and also known as D.C. or Washington, is the capital city of the United States of America. Founded after the American Revolution, Washington was named for George Washington, the first president of the United States and a Founding Father. As the seat of the United States federal government and several international organizations, Washington is an important world political capital. Located on the Potomac River bordering Maryland and Virginia, the city is one of the most visited cities in the United States, with more than 20 million visitors annually.The signing of the Residence Act on July 16, 1790, approved the creation of a capital district located along the Potomac River near the country's East Coast. The U.S. Constitution provided for a federal district under the exclusive jurisdiction of the U.S. Congress, and the district is therefore not a part of any U.S. state. The states of Maryland and Virginia each donated land to form the federal district, which included the pre-existing settlements of Georgetown and Alexandria. The City of Washington was founded in 1791 to serve as the new national capital. In 1846, Congress returned the land originally ceded by Virginia, including the city of Alexandria; in 1871, it created a single municipal government for the remaining portion of the district.
Washington had an estimated population of 705,749 as of July 2019, making it the 20th most populous city in the United States. Commuters from the surrounding Maryland and Virginia suburbs raise the city's daytime population to more than one million during the workweek.
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Portsmouth ( (listen)) is a port city primarily built on Portsea Island in the county of Hampshire, South East England. It is also known colloquially as Pompey, a nickname shared with HMNB Portsmouth and the Portsmouth Football Club. It is the United Kingdom's only island city. Portsmouth is situated 70 miles (110 km) south-west of London and 19 miles (31 km) south-east of Southampton. Portsmouth's population was recorded as 205,100 in the 2011 UK Census. The city forms part of the South Hampshire conurbation.
Portsmouth's history can be traced back to Roman Britain. A significant naval port for centuries, it has the world's oldest dry dock. Portsmouth was England's first line of defence during the 1545 French invasion. By the early nineteenth century, the world's first mass-production line was set up in Portsmouth Dockyard's Block Mills; this made it the world's most industrialised site, and the birthplace of the Industrial Revolution. Portsmouth was the most heavily-fortified town in the world and was considered "the world's greatest naval port" at the height of the British Empire, during the Pax Britannica. The Palmerston Forts were built around Portsmouth in 1859 in anticipation of another invasion from continental Europe.
King Richard I first granted Portsmouth market town status on 2 May 1194 with a royal charter and a coat of arms, "a crescent of gold on a shade of azure, with a blazing star of eight points".
On 21 April 1926, Portsmouth was elevated from town to city status. Its motto, "Heaven's Light Our Guide" (referring to the city's eight-pointed star and crescent-moon emblem), was registered in 1929. The 800th anniversary of the royal charter was celebrated on 2 May 1994. Portsmouth became a unitary authority on 1 April 1997, with its city council gaining the powers of a non-metropolitan county and district council previously held by Hampshire County Council.