On first publication this reference work of heroic scale immediately became the standard in its field: it "changed the face of English architectural history", according to David Watkin.
The work includes every building within its time range with which the name of an architect can be associated, based on documentary evidence from extensive archival research, both by him and a growing network of correspondents.
His most famous coup was to lead a campaign which succeeded in inducing the then Chancellor of the Exchequer Nigel Lawson to alter the 1984 Budget so as to save Calke Abbey in Derbyshire for the nation.
[1] Colvin's research papers and correspondence associated with the Dictionary of British Architects, 1600–1840 are held in the archives of the Paul Mellon Centre in London.
These arrived along with a number of architectural history publications including country house guidebooks which were bequeathed to the Paul Mellon Centre's library.