He devised Quebec's provincial coat-of-arms and motto Je me souviens.

Thus, he studied in both the Petit Séminaire de Québec and at Upper Canada College in Toronto, Ontario.

In 1856, Taché took a three-year course in surveying, and in the course of his education successively studied under Frederick Preston Rubidge, Walter Shanly, and finally Charles Baillairgé.

Although he hadn't studied it formally, Taché learned a great deal from books and journals that he read.

He devised the province's coat-of-arms and motto, Je me souviens ("I remember").