Back in April, they ruled the world. Now, all but one of them is going or gone.
This photograph of (left to right) David Cameron, Barack Obama, Francois Hollande, Angela Merkel and Matteo Renzi was taken at a G5 summit in April.
Since Italian Prime Minister Renzi announced his intention to resign last night after losing a referendum on constitutional reform, people have been sharing the photo online to demonstrate just how much the world has changed in a short space of time.
Only German Chancellor Merkel will remain in power, although even she faces elections next year.
- David Cameron
The former British prime minister was the first to go, resigning on June 24, the day after the country voted to leave the EU in a referendum.
Mr Cameron, who backed a Remain vote, said Britain required "fresh leadership" to negotiate the country's exit from the EU.
- Barack Obama
With a two-term limit on US presidencies, this has of course been coming.
But when Americans elected Donald Trump as their 45th president on November 8, the countdown truly began to when Mr Obama will leave office, which will happen when the new president is inaugurated on January 20.
- Francois Hollande
Last week, the French president announced he would not be standing for re-election.
Mr Hollande, who was elected in 2012, has battled deep unpopularity among the French public recently, with his ratings suffering significantly in the aftermath of terrorist attacks in Paris and Nice.
- Matteo Renzi
Matteo Renzi staked his political future on the outcome of Italy's referendum on constitutional reform - and lost.
When the outcome became clear, Mr Renzi swiftly announced he would be standing down.
- Angela Merkel
German Chancellor Merkel is still in power and last month announced she will run for a fourth term in next year's election.
The eyes of Europe and the world will be focused on the outcome in the Autumn.