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On the sign:
ENGLISH HERITAGE
A.W. HOFMANN 1818-1892 Professor of Chemistry lived here
The English Heritage Trust is a charity that cares for over 400 historical buildings, monuments and other places.
The sign is on the wall of the house where the German chemist August Wilhelm von Hoffmann (1818-1892) lived. Hoffman was mainly involved in the field of organic chemistry, and "Hofmann elimination" and "Hofmann rearrangement" are named after him In 1845 he received an offer to serve as the director of the Royal College of Chemistry in London which was opened at that time. After two years in the position he returned to Germany (Bonn)