Boston was founded on September 17, 1630, by Puritan colonists from England. The Puritans of the Massachusetts Bay Colony are sometimes confused with the Pilgrims, who founded Plymouth Colony ten years earlier in what is today Bristol County, Plymouth County, and Barnstable County, Massachusetts. The two groups, which differed in religious practice, are historically distinct. The separate colonies were not united until the formation of the Province of Massachusetts Bay in 1691.
The Shawmut Peninsula was connected to the mainland by a narrow isthmus and was surrounded by the waters of Massachusetts Bay and the Back Bay, an estuary of the Charles River. Several prehistoric Native American archaeological sites that were excavated in the city have shown that the peninsula was inhabited as early as 5000 BC. Boston's early European settlers first called the area Trimountaine, but later renamed the town after Boston, Lincolnshire, England, from which several prominent colonists had emigrated.
Owing to its early founding, Boston is very compact. According to the United States Census Bureau, the city has a total area of 89.6 square miles (232.1 km²)—48.4 square miles (125.4 km²) (54.0%) of land and 41.2 square miles (106.7 km²) (46.0%) of water. Boston is the country's fourth most densely populated city that is not a part of a larger city's metropolitan area. This is largely attributable to the rarity of annexation by New England towns. Of United States cities with more than 600,000 people, only San Francisco is smaller in land area. Boston is surrounded by the "Greater Boston" region and is bordered by the cities and towns of Winthrop, Revere, Chelsea, Everett, Somerville, Cambridge, Watertown, Newton, Brookline, Needham, Dedham, Canton, Milton, and Quincy. The Charles River separates Boston proper from Cambridge, Watertown, and the neighborhood of Charlestown. To the east lies Boston Harbor and the Boston Harbor Islands National Recreation Area (BHINRA). This includes part of the city's territory, specifically Calf Island, Gallops Island, Great Brewster Island, Green Island, Little Brewster Island, Little Calf Island, Long Island, Lovells Island, Middle Brewster Island, Nixes Mate, Outer Brewster Island, Rainsford Island, Shag Rocks, Spectacle Island, The Graves, and Thompson Island. The Neponset River forms the boundary between Boston's southern neighborhoods and the city of Quincy and the town of Milton. The Mystic River separates Charlestown from Chelsea and Everett, and Chelsea Creek and Boston Harbor separate East Boston from Boston proper. Boston's official elevation, as measured at Logan International Airport, is 19 ft (5.8 m) above sea level.[56] The highest point in Boston is Bellevue Hill at 330 ft (101 m) above sea level, and the lowest point is at sea level.
Boston is sometimes called a "city of neighborhoods" because of the profusion of diverse subsections. There are 21 official neighborhoods in Boston used by the city. These neighborhoods include: Allston/Brighton, Back Bay, Bay Village, Beacon Hill, Charlestown, Chinatown/Leather District, Dorchester, Downtown/Financial District, East Boston, Fenway/Kenmore, Hyde Park, Jamaica Plain, Mattapan, Mission Hill, North End, Roslindale, Roxbury, South Boston, South End, West End, and West Roxbury.
Boston shares many cultural roots with greater New England, including a dialect of the non-rhotic Eastern New England accent known as Boston English, and a regional cuisine with a large emphasis on seafood, salt, and dairy products. Irish Americans are a major influence on Boston's politics and religious institutions. Boston also has its own collection of neologisms known as Boston slang.
The city has a number of ornate theatres, including the Cutler Majestic Theatre, Boston Opera House, Citi Performing Arts Center, the Colonial Theater, and the Orpheum Theatre. Renowned performing-arts organizations include the Boston Symphony Orchestra, Boston Ballet, Boston Early Music Festival, Boston Lyric Opera Company, OperaBoston, and the Handel and Haydn Society (one of the oldest choral companies in the United States). The city is also a major center for contemporary classical music, with a number of performing groups, some of which are associated with the city's conservatories and universities. There are also many major annual events such as First Night, which occurs on New Year's Eve, the annual Boston Arts Festival at Christopher Columbus Waterfront Park, Italian summer feasts in the North End honoring Catholic saints, and several events during the Fourth of July period. These events include the week-long Harborfest festivities and a Boston Pops concert accompanied by fireworks on the banks of the Charles River.