Title: Central Penn College
Content:  The main campus of Central Penn College is located in Summerdale, Pennsylvania. The campus comprises four academic buildings, the Charles "T" Jones Leadership Library, thirty-four student townhouses, six apartment buildings, a new Health Sciences Building, the Underground Student Union, and the Boyer House. The main campus is home to large yearly events including the college's annual Fall Harvest (homecoming) event, as well as Festival of Nations and SummerFest.
Title: Pennsylvania State University Commonwealth campuses
Content: Notes: ; 1) - formerly Penn State Ogontz ; 2) - formerly Penn State Behrend and colloquially referred to simply as "Behrend" ; 3) - formerly Penn State Delaware County ; 4) - formerly Penn State McKeesport ; 5) - formerly Penn State Worthington Scranton ; 6) - formerly Penn State Shenango Valley ; 7) - Penn State's flagship, main campus; often referred to synonymously as "Penn State University" The first two years of education for any Penn State major are available at all campuses; however, some majors can be completed only at specific campuses. 
Title: State College, Pennsylvania
Content:  University Park is the largest Penn State campus and the postal address for the University. Notable sites include Old Main, a landmark of the Farmers' High School Historic District, Rec Hall, the Nittany Lion Shrine, the Palmer Museum of Art, Penn State Creamery, Beaver Stadium, and the Bryce Jordan Center, the latter two being on the College Township half of University Park.
Title: University Park, Pennsylvania
Content:  University Park (also referred to as Penn State University Park) is the name given to the Pennsylvania State University's main campus located in both State College and College Township, Pennsylvania. The campus post office was designated "University Park, Pennsylvania" in 1953 by Penn State president Milton Eisenhower, after what was then Pennsylvania State College was upgraded to university status.
Title: Pennsylvania State University Commonwealth campuses
Content:  The Pennsylvania State University is a geographically dispersed university system with campuses located throughout the Commonwealth of Pennsylvania. While the administrative hub of the university is located at its flagship campus, University Park, the 19 additional commonwealth campuses together enroll 37 percent of Penn State's undergraduate student population.
Title: Penn State New Kensington
Content:  Penn State New Kensington is a commonwealth campus of the Pennsylvania State University and it is located in New Kensington, Pennsylvania. The campus has an enrollment of 545 undergraduate students and offers twelve bachelor's degree programs and five associate degree programs as well as four men's and four women's sports.
Title: Old Main (Pennsylvania State University)
Content:  Old Main (originally called "Main Building") is The Pennsylvania State University's first building of major significance. First completed in 1867, the current incarnation of the building was completed in 1930. Today, Old Main serves as the administrative center of Penn State, housing the offices of the president and other officials. It is located in the Farmers' High School Historic District, added to the National Register of Historic Places in 1981.
Title: Pennsylvania State University
Content:  universities (along with Cornell University, Oregon State University, and University of Hawaiʻi at Mānoa). Its University Park campus, which is the largest and serves as the administrative hub, lies within the Borough of State College and College Township. It has two law schools: Penn State Law, on the school's University Park campus, and Dickinson Law, in Carlisle. The College of Medicine is in Hershey. Penn State is one university that is geographically distributed throughout Pennsylvania. There are 19 commonwealth campuses and 5 special mission campuses located across the state. Annual enrollment at the University Park campus totals more than 46,800 graduate and undergraduate students, making it one of the largest universities in the United States. It has the world's largest dues-paying alumni association. The university's total 
Title: Penn State Schuylkill
Content:  Penn State Schuylkill is a Commonwealth Campus of the Pennsylvania State University and it is located in Schuylkill Haven, Pennsylvania.
Title: Penn State Shenango
Content:  Penn State Shenango is a commonwealth campus of the Pennsylvania State University and it is located in Sharon, Pennsylvania. Penn State Shenango is the only urban campus in the Penn State system, although some parts of Penn State Altoona that are located in the heart of Altoona's downtown are urban in nature.

Question: what is penn state's main campus?
Answer: University Park.