Karl Waldemar Ziegler was a German chemist who won the Nobel Prize in Chemistry in 1963, with Giulio Natta, for work on polymers. The Nobel Committee recognized his "excellent work on organometallic compounds [which]...led to new polymerization reactions and ... paved the way for new and highly useful industrial processes". He is also known for his work involving free-radicals, many-membered rings, and organometallic compounds, as well as the development of Ziegler–Natta catalyst. One of many awards Ziegler received was the Werner von Siemens Ring in 1960 jointly with Otto Bayer and Walter Reppe, for expanding the scientific knowledge of and the technical development of new synthetic materials. The Nobel Prize in Chemistry 1963, announced November 5, 1963. Karl Ziegler and Giulio Natta, “for their discoveries in the field of the chemistry and technology of high polymers”. Karl Ziegler: born 1898, Helsa, Germany. Giulio Natta: born 1903, Imperia, Italy. Wiki link Wiki link Data: the Nobel Foundation (CC0).