The seeds of Canada's largest 19th-century distilling firm were sown in 1837 when a still was set up on this site to convert surplus grain from an 1832 grist mill into whisky. Exploiting new technologies and commercial opportunities, Gooderham and Worts grew steadily, parallelling Toronto's rise as a manufacturing centre. With the large stone distillery erected in 1859-61 and brick malthouse, kilns, warehouses, shops and offices built before 1900, this complex is an outstanding example of Victorian industrial design in terms of integrity, historical associations and aesthetic qualities.