San Antonio is a major Texas city and the seventh-most populous in the United States, with 1.43 million residents, making it the second-largest city in Texas and the county seat of Bexar County. Named in 1691 for Saint Anthony of Padua, it became the first chartered civil settlement in present-day Texas in 1731, transitioning from Spanish and Mexican rule to the U.S. after Texas's annexation in 1846. The city is famous for its five 18th-century Spanish missions, including The Alamo, which are UNESCO World Heritage sites, alongside popular attractions like the River Walk and the five-time NBA champion San Antonio Spurs. As a key military hub, it hosts Fort Sam Houston and other bases, while also serving as an economic powerhouse with two Fortune 500 companies and the South Texas Medical Center. Notably, it has the largest majority-Hispanic population in the U.S., with 64% of residents identifying as Hispanic, and welcomes roughly 32 million visitors annually. Anchoring the Texas Triangle megaregion, San Antonio and nearby Austin form a metroplex of about 5 million people, with the city's own metro area ranking as the 24th-largest in the nation.