German politician and former research scientist Angela Merkel has been the Chancellor of Germany since 2005.

His full title is a mouthful: His Holiness Francis, Bishop of Rome, Vicar of Jesus Christ, Successor of the Prince of the Apostles, Supreme Pontiff of the Universal Church, Primate of Italy, Archbishop and Metropolitan of the Roman Province, Sovereign of the Vatican City State, Servant of the servants of God.

She recently became the longest-serving monarch in UK history.

Before entering politics, Putin was a KGB officer for 16 years.

Canada's current Prime Minister is the son of former Prime Minister Pierre Trudeau.

She is the only First Lady to have sought elected office in the USA.

The Greek economist is active in the global forum.

Xi Jinping is the President of China and the General Secretary of the Communist Party of China.

Rousseff is the first woman president of Brazil.

Shinzo Abe has served as Prime Minister of Japan since 2012.