At twenty, Rudbeck made a scientific discovery of great importance, which caused a stir in the whole learned world. By his discovery and theory of the lymphatic ducts, the blood circulation of the human body received a satisfactory explanation. Before the circle of scholars which surrounded Queen Christine, Rudbeck was allowed to demonstrate his anatomical discoveries, in 1652. Queen Christine, who earlier had been an admirer of his beautiful voice and musical abilities, loaded him with praise and gave him the means for a journey abroad. Rudbeck returned, in 1660, to Sweden, and was appointed professor of medicine at the University of Upsala. He planned the first botanic garden in the country, donating it to the university. He had illustrations made of the native plants and commenced a learned work on botany. The first hall of anatomy was erected according to his proposition. As rector of the university, he established several important reforms, in spite of opposition, but supported by the chancellor, Magnus Gabriel de la Gardie, who was his friend and protector. To the stupendous mastery of all sciences, Rudbeck added a skill and cleverness in various branches of practical activity which made him carry, with honor, the nickname of “master at all trades.” He was an excellent financier, who succeeded in restoring the sound economy of the university. He built a fish pond, from which the tables of the learned professors were regularly supplied with fish. A book store and a book-printing establishment were erected by him, and for a time run at his expense. He repaired windmills, built houses, provided the university town with water works and street pavement, also arranging its postal service. Rudbeck was one of the finest composers and singers of his day, conducting the musical exercises at the university. He made fireworks and compasses for the Swedish navy, built fountains and organs, was a good poet and painter and an excellent etcher and drawer.