joint use. In 1936 the separating wall was removed. The church is now exclusively used by Protestants. Furthermore, there is the Catholic Church of the Jesuits. Its construction began in 1712. It was completed with the addition of a bell tower from 1866 to 1872. The church is also home to the Museum für sakrale Kunst und Liturgie (Museum of Ecclesiastical Arts). The oldest church in Heidelberg is the St. Peter's Church (now Lutheran). It was built some time during the 12th century. Education Universities and academia Heidelberg is known for its institutions of higher education. The most famous of those is Heidelberg University. Founded in 1386, it is one of Europe's oldest institutions. In fact, Heidelberg is the oldest university town of today's Germany. Among the prominent thinkers associated with the institution are Georg Wilhelm Friedrich Hegel, Karl Jaspers, Hans-Georg Gadamer, Jürgen Habermas, Karl-Otto Apel and Hannah Arendt. The campus is situated in two urban areas and several buildings. In numerous historical buildings in the old town there are the Faculties of the Humanities, the Social Science and the Faculty of Law. The school of applied sciences is located in the Science Tower in Wieblingen. The Faculties of Medicine and Natural Science are settled on the Neuenheimer Feld Campus. The campus of Heidelberg University has a total undergraduate enrollment of 30,898 as of 2014. The enrollment rate of this university is 16.3 percent. Less than 20 percent of the total student body is international. This university has many areas of study for national students such as; theology, law, philosophy, modern languages, economics, and social sciences. The university does not charge students for tuition. The school's academic calendar is semester based, and the majority of the language for instruction is in German. For international students the academic calendar is based on a block schedule. The international students attend in block periods of 5 weeks. The University or "Uni" is spread across three campuses each containing different fields of study. Since 1904 there has been a College of Educational Science, the Pädagogische Hochschule Heidelberg; since 1979 there has been a college of Jewish Studies, the Hochschule für Jüdische Studien Heidelberg. It comprises nine branches specializing in both religion and Jewish culture. The Schiller International University, a private American university is also represented with a campus in Heidelberg offering several undergraduate and graduate programs in the fields of International Business and International