Bonn, a city of Rhenish Prussia, lying on the left bank of the Rhine. It is chiefly famed for its university. This great institution has about 185 professors and lecturers and 3,275 students, a library of 250,000 volumes, a splendid laboratory, an art museum, an observatory, a botanic garden and various other valuable collections. There is also a celebrated agricultural academy. Among the famous professors of the university were the great historian Niebuhr and the philosopher Schlegel. Niebuhr, Bunsen and Schumann lie buried in the minster of Bonn, which is said to have been founded by the Empress Helena in 320; and near it is a monument to Beethoven. Population about 87,967.