Born – 7 December 1810 AD and died – 11 January 1882 AD. He is a resident of Germany. He is called the proponent of the cell theory. He pointed out that organisms are made up of cells and new cells are formed from old cells. Discover the myelin sheath of peripheral axons and marked muscle. Identified the role of microorganisms in decomposition. He won the Copley Medal in 1845.