John Christopher Pratt was among Canada's most prominent painters and printmakers. In addition to a body of highly acclaimed paintings, prints, drawings and writing, he designed the flag of Newfoundland and Labrador.

The flag of Newfoundland and Labrador was introduced in 1980 and was designed by Newfoundland artist Christopher Pratt. The flag design was approved by the House of Assembly of the province of Newfoundland, Canada, on May 28, 1980. It was flown for the first time on Discovery Day, June 24, 1980. The name of the province was changed to Newfoundland and Labrador by an amendment to the constitution of Canada in December 2001 at the request of the provincial legislature.