Prince Charles and his wife Camilla, the Duchess of Cornwall, will visit four communities in three provinces during their mini-tour of Canada next month.

The couple will stop first at CFB Gagetown, in Oromocto N.B., followed by Saint John, then Toronto and finally Regina as part of their trip honouring Queen Elizabeth's Diamond Jubilee.

The itinerary was released Monday by Heritage Minister James Moore.

"We are delighted that Their Royal Highnesses will join Canadians in celebrating the 60th anniversary of her Majesty's reign as Queen of Canada," Moore said in a statement.

"Occasions such as this are rare. The only other time Canada celebrated the Diamond Jubilee of a reigning King or Queen was for Queen Victoria in 1897."

The couple's visit -- their first since 2009 -- will be brief, lasting just a few days from May 21 to 23.

They will arrive at CFB Gagetown, in Oromocto, N.B. on May 21, then travel to Saint John later in the day for a brief visit.

That same day they will fly to Toronto, where they will spend the night of May 21 before flying to Regina, Sask. on May 22, where they will remain until May 23 when they will wrap up their visit.

A statement from Prince's Charities Canada said the visit will focus on some of the Prince of Wales' ongoing charity initiatives in Canada, including his Operation Entrepreneur and Seeing is Believing projects.

"The Prince of Wales has been involved in Canadian public life for more than 40 years," said Amanda Sherrington, president and CEO of Prince's Charities Canada in a statement.

"The Prince's visit, in honour of The Queen's Diamond Jubilee, represents a special opportunity to remind Canadians of his and the Royal Family's ongoing charitable involvement in Canada."

The details about the planned visit came on the same day Prime Minister Stephen Harper announced that former prime minister Jean Chretien will be serving as Canada's representative to The Queen Elizabeth Diamond Jubilee Trust.

The trust has been established to raise funds to support a number of charitable initiatives across the Commonwealth, in honour of the 60th anniversary of the Queen's reign.

Chretien will sit as a member of an advisory group to the trust.

"Former prime minister Chretien is uniquely qualified to serve as Canada's representative to the Diamond Jubilee Trust," Harper said in a release.

He added that Chretien's relationship with Queen Elizabeth spans 40 years, including six official tours he hosted during his time as prime minister.

Chretien is also a member of the Queen's Order of Merit, Harper said.

The Diamond Jubilee Trust, launched earlier this year, will focus on priorities such as combating curable diseases across the Commonwealth, and promoting education and culture.

Governments, individuals, organizations and businesses will fund the projects "that seek to make a real and enduring difference in people's lives throughout the Commonwealth," according to the statement.