The University of Pittsburgh (commonly referred to as Pitt) is a state-related research university located in Pittsburgh, Pennsylvania. In 1787 after the American Revolutionary War, it was founded on the edge of the American frontier as the Pittsburgh Academy. It developed and was renamed as Western University of Pennsylvania by a change to its charter in 1819. After surviving two devastating fires and various relocations within the area, the school moved to its current location in the Oakland neighborhood of the city; it was renamed as the University of Pittsburgh in 1908. For most of its history, Pitt was a private institution, until 1966 when it became part of the Commonwealth System of Higher Education. 

The university is composed of 17 undergraduate and graduate schools and colleges located at its urban Pittsburgh campus, home to the university's central administration and 28,766 undergraduate, graduate, and professional students. The university also includes four undergraduate schools located at campuses within Western Pennsylvania: Bradford, Greensburg, Johnstown, and Titusville. The 132-acre Pittsburgh campus has multiple contributing historic buildings of the Schenley Farms Historic District, most notably its 42-story Gothic revival centerpiece, the Cathedral of Learning. The campus is situated adjacent to the flagship medical facilities of its closely affiliated University of Pittsburgh Medical Center (UPMC), as well as the Carnegie Museums of Pittsburgh, Schenley Park, and Carnegie Mellon University.
when it became a part of what system?
Commonwealth System of Higher Education. 