The University of Pennsylvania (Penn or UPenn) is a private Ivy League research university in Philadelphia, Pennsylvania, United States. Chartered in 1755 by its first president Benjamin Franklin, who advocated for an educational institution that trained leaders in academia, commerce, and public service, it is one of nine colonial colleges in the country. The university has 4 undergraduate schools and 12 graduate and professional schools. Schools enrolling undergraduates include the College of Arts and Sciences, the School of Engineering and Applied Science, the Wharton School, and the School of Nursing. Among its graduate schools are its law school, whose first professor, James Wilson, helped write the U.S. Constitution, and its medical school, the first in North America.