RUDOLF VIRCHOW (1821-1902) was born in Schievelbein in Pomerania. He studied medicine at the University of Berlin, and was one of those who were taught by Johannes Müller. Virchow's contributions to medicine are immense. His most important work was published in 1858, the classic Die Cellularpathologie, one of the great books of medicine, in which he presented his view "of the cellular nature of all life-processes, both physiological and pathological…" He stated his famous dictum: "Every cell from a cell" and that every "pathological form has its physiological prototype." This book caused a revolution in medical thinking.