What Kennedy Space Center runway complex was built for shuttle landings?

The Kennedy Space Center runway complex built for shuttle landings was the Shuttle Landing Facility.

Located on Merritt Island, Florida, the Shuttle Landing Facility was constructed specifically to support the Space Shuttle’s return to Earth. Its single concrete runway, designated 15/33, is 15,000 feet long and 300 feet wide, giving the unpowered orbiter an unusually long surface on which to land and brake.

Construction began in 1974, and the facility officially opened in 1976. The runway was first used for an actual shuttle landing on February 11, 1984, when Challenger returned from mission STS-41-B. It later became the landing site for many missions, although Edwards Air Force Base remained an important alternative, and STS-3 landed at White Sands.

The Shuttle Landing Facility is not the same as Launch Complex 39, where shuttles launched, or an Orbiter Processing Facility, where orbiters were serviced. It also has the aviation designation TTS and continues to support other aircraft and space vehicles.