杜希德教授（Prof. Denis Crispin Twitchett [1925.9.23~ 2006.2.24]）是西方漢學界的大師，先後任教於倫敦大學 、劍橋大學、普林斯頓大學，並在1967年獲選為英國國 家學術院院士。杜教授的專長是中國中古史，但事實他 涉獵的範圍非常之廣。杜教授同時也是《劍橋中國史》 的總編輯，Asia Major的主編，劍橋中華文史叢刊 （歷史類） 的主編。主要的著作有《唐代財政制度》(1963)、《唐代 的官修史學》(1992) 等，對東亞史研究積功甚深，聲譽崇隆。

Professor Denis Crispin Twitchett (September 23, 1925 - February 24, 2006) was a major figure in Western Sinology who over his career was a professor at the University of London, Cambridge University, and Princeton University. In 1967 he was elected a Fellow of the British Academy. Professor Twitchett's speciality was mediaeval Chinese history, but the range of his scholarly endeavours was extremely broad. He was also the main editor of the Cambridge History of China project, the founding editor of the Third Series of the scholarly journal Asia Major, and editor of the Cambridge Studies in Chinese History, Literature and Institutions, a scholarly monograph series published by Cambridge University. His scholarly monographs include: Financial Administration under the T'ang Dynasty (1963), The Writing of Official History under the T'ang (1992).