The year 2015 was one for the political history books.

The scandalous trial of Senator Mike Duffy, the ascendancy of Rachel Notley and the NDP in Alberta, a gruelling 78-day federal election campaign and Liberal Leader Justin Trudeau's stunning victory were just some of the moments that profoundly altered the Canadian political landscape.

CBC News has assembled 15 of the memorable photos of the year: 

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Eve Adams, left, is joined by Trudeau as the MP announces in Ottawa on Feb. 9 that she is leaving the Conservative Party to join the Liberals. (Justin Tang/Canadian Press)

duffy trial

Mike Duffy arrives for his first appearance at the provincial courthouse in Ottawa on April 7. Duffy has pleaded not guilty to fraud-related charges linked to expenses he claimed as a senator. (Justin Tang/Canadian Press)

notley election

NDP Leader Rachel Notley reacts on stage after being named Alberta's new premier in Edmonton on May 5. (Nathan Denette/Canadian Press)

Press Gallery dinner

Transport Minister Lisa Raitt tried to convince Green Party Leader Elizabeth May to wrap it up when it was obvious May's weekend dinner speech was going wrong. (Fred Chartrand/Canadian Press)

Truth and Reconciliation

Residential school survivor Lorna Standingready is comforted by a fellow survivor in the audience during the closing ceremony of the Indian Residential Schools Truth and Reconciliation Commission, at Rideau Hall in Ottawa on June 3. (Sean Kilpatrick/Canadian Press)

YEAR Diary Year end photo package

Prime Minister Stephen Harper, with his wife, Laureen Harper, visits Gov. Gen. David Johnston to dissolve Parliament and trigger an election campaign at Rideau Hall in Ottawa on Aug. 2. (Justin Tang/Canadian Press)

YEAR Diary Year end photo package

Federal NDP Leader Tom Mulcair jumps off a ledge as he heads to a photo-op Aug. 12 in Lévis, Que. (Ryan Remiorz/Canadian Press)

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Nigel Wright, former chief of staff to then PM Harper, leaves the courthouse in Ottawa for a break as he testifies in the fraud trial of Senator Mike Duffy on Aug. 12. Duffy has pleaded not guilty in the trial linked to his Senate expenses. (Justin Tang/Canadian Press)

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Harper speaks to supporters on Sept. 14 in Kamloops, B.C., while on the election campaign trail. (Ryan Remiorz/Canadian Press)

YEAR Diary Year end photo package

Trudeau paddles a canoe down the Bow River in Calgary on Sept, 17. (Jonathan Hayward/Canadian Press)

YEAR Diary Year end photo package

Mulcair salutes supporters at a rally on Oct. 10 in Victoria. (Ryan Remiorz/Canadian Press)

YEAR Diary Year end photo package

Harper pauses for a moment as he addresses the crowd on election night in Calgary on Oct. 19 following a stunning defeat. (Jonathan Hayward/Canadian Press)

Margaret Trudeau congratulates son Justin on election win Oct 19 2015

Justin Trudeau is embraced by his mother, Margaret Trudeau, as he arrives in Montreal to give his victory speech. (Jim Young/Reuters)

YEAR Diary Year end photo package

Prime minister-designate Trudeau and Harper place a wreath during a ceremony Oct. 22 marking the one-year anniversary of the attack on Parliament Hill at the National War Memorial in Ottawa. (Sean Kilpatrick/Canadian Press)

YEAR Diary Year end photo package

The prime minister-designate and his wife, Sophie Gregoire-Trudeau, walk to Rideau Hall with the government's future cabinet to take part in a swearing-in ceremony in Ottawa on Nov. 4. (Sean Kilpatrick/Canadian Press)

For more political photos check out our full gallery.