Maurice de Berkeley, 4th Baron Berkeley Maurice de Berkeley, 4th Baron Berkeley Maurice de Berkeley, 4th Baron Berkeley (c. 1330 – 8 June 1368), "The Valiant", feudal baron of Berkeley, of Berkeley Castle in Gloucestershire, was an English peer. His epithet, and that of each previous and subsequent head of his family, was coined by John Smyth of Nibley (died 1641), steward of the Berkeley estates, the biographer of the family and author of "Lives of the Berkeleys". He was born in Berkeley Castle in Gloucestershire, the eldest son and heir of Thomas de Berkeley, 3rd Baron Berkeley by his wife Lady Margaret Mortimer. In August
University of California, Berkeley in the world during World War II, and was the founder of the Berkeley Center for Theoretical Physics. Faculty member Edward Teller was (together with Stanislaw Ulam) the "father of the hydrogen bomb", who laid important foundations for the establishment of Space Sciences Laboratory at Berkeley. Ernest Lawrence, a Nobel laureate in physics who invented the cyclotron at Berkeley, and founded the Radiation Laboratory on campus, which later became the Lawrence Berkeley National Laboratory. Nobel laureate Glenn T. Seaborg discovered or co-discovered 10 chemical elements at Berkeley and served as the Chancellor of UC Berkeley from 1958–1961. Former United States