Rudolf Virchow (1821-1902) and Die Cellularpathologie (1858).

Rudolf Virchow gave clinical significance to Schwann's cell theory and thereby changed the course of pathology. Although he intended to found a science of pathological physiology based on omnis cellula e cellula, advances in microscopy facilitated and promoted, even dictated, the development of histopathology. As well as Die Cellularpathologie and Die krankhaften Geschwülste, Virchow has left the Archiv which he edited until shortly before his death in 1902. In later life he turned increasingly to anthropology, archaeology, and ethnology, but from an early age he was renowned as a fiery liberal politician.