“The NASA Manned Spacecraft Center in Houston was born out of the early space program’s need for facilities to house the Space Task Group (STG), formed soon after the creation of NASA and originally located at the Langley Research Center in Virginia. Beginning with Project Mercury, Langley was the center of U.S. human spaceflight training and management through Gemini III. With the daunting task outlined by President Kennedy to put a man on the Moon by the end of the decade, the STG needed new quarters with test facilities and research laboratories suitable to mount an expedition to the Moon. The NASA installation was originally designated the Manned Spacecraft Center (MSC), and from its inception, it was to be the lead center for U.S. space missions involving astronauts. The Center’s famed Mission Control Center, or MCC, has been the operational hub of every American human space mission since Gemini IV in June 1965.
Construction of the Control Center began in late 1962. In addition to conducting mission simulations and operations with flight controllers, space was allocated for key NASA engineering and scientific personnel along with representatives of the major contractors to support each mission. The Manned Spacecraft Center was renamed the Lyndon B. Johnson Space Center on August 27, 1973” (https://www.nasa.gov/offices/history/center_history/johnson_space_center)