Dallas developed as a strong industrial and financial center, and a major inland port, due to the convergence of major railroad lines, interstate highways, and the construction of Dallas/Fort Worth International Airport, one of the largest and busiest airports in the world.Preceded by thousands of years of varying cultures, the Caddo people inhabited the Dallas area before Spanish colonists claimed the territory of Texas in the 18th century as a part of the Viceroyalty of New Spain.In 1839, Warren Angus Ferris surveyed the area around present-day Dallas.John Neely Bryan established a permanent settlement near the Trinity River named Dallas in 1841. The general consensus is that the city was named after either Dallas, Scotland or after Sen. The Republic of Texas was annexed by the United States in 1845 and Dallas County was established the following year.Top to bottom, left to right: Downtown Dallas skyline, Old Red Museum, North Park Center, Dallas City Hall, Dallas Museum of Art, Winspear Opera House, Perot Museum of Nature and Science, State Fair of Texas at Fair Park, Dallas Union Station, the Dallas Arboretum and Botanical Garden, and the American Airlines Center) is a city in the U. The United States Census Bureau's estimate for the city's population increased to 1,317,929 as of July 1, 2016. It is the most populous city in the Dallas–Fort Worth metroplex, which is the fourth most populous metropolitan area in the United States. According to the 2010 United States Census, the city had a population of 1,197,816. The bulk of the city is in Dallas County, of which it is the county seat; however, sections of the city are located in Collin, Denton, Kaufman, and Rockwall counties. The city's prominence arose from its historical importance as a center for the oil and cotton industries, and its position along numerous railroad lines.
In 1819, the Adams-Onís Treaty between the United States and Spain defined the Red River as the northern boundary of New Spain, officially placing the future location of Dallas well within Spanish territory.
On March 3, 1910 Allen Brooks was abducted from court and hung from Elk's Arch.
Several hundred white people participated in the lynching in down town Dallas.
In 1921, the Mexican president Álvaro Obregón along with the former revolutionary general visited downtown Dallas' Mexican Park in Little Mexico, the small park was located on the corner of Akard and Caruth Street, site of the current Fairmount Hotel. Kennedy was assassinated on Elm Street while his motorcade passed through Dealey Plaza in downtown Dallas. Johnson told police during a standoff that he was upset about recent police shootings of black men and wanted to kill whites, especially white officers.
The upper two floors of the building from which alleged assassin Lee Harvey Oswald shot Kennedy, the Texas School Book Depository, have been converted into a historical museum covering the former president's life and accomplishments. After hours of negotiation failed, police resorted to a robot-delivered bomb, killing Johnson inside El Centro College.