OTTAWA — Nine years before Rosa Parks refused to give up her seat on a Jim Crow-era bus in Montgomery, Ala., Viola Desmond tried to sit in a whites-only section of a movie theater in New Glasgow, Nova Scotia.

Ms. Desmond, a businesswoman who had her own line of cosmetics and who died in 1965, was prosecuted for trying to defraud the provincial government of 1 cent — the difference in sales tax for a seat in the balcony, where blacks were expected to sit and the whites-only ground floor ticket price. While she offered to pay the tax, she was convicted and fined 26 Canadian dollars, including court costs, at a trial at which the theater owner acted as the prosecutor and she was without a lawyer.

Now she is about to become the first black person — and the first woman other than a British royal — to appear alone on Canadian currency. The new series of $10 bills is to be released this year.

“Outside of the Underground Railroad story, which has a fair amount of mythologizing around it, Canadians do not know about black Canadian history,” said Barrington Walker, a history professor at Queen’s University in Kingston, Ontario. “Black history was imagined as not central to the founding of the country.”