Statue of Sir Winston Churchill, Parliament Square, Parliamentary Buildings in background, London, England, United Kingdom, Europe

Statue of Seddon, New Zealand Prime Minister, outside Beehive and Parliament House, Wellington, North Island, New Zealand, Pacific

Statue of Sir Winston Churchill, Parliament Square, London, England, United Kingdom, Europe

Colourful building on Mustafa Matohiti Street where the Prime Minister lives, Tirana, Albania, Europe

Parliament Square, Winston Churchill statue and NATO flags, Westminster, London, England, United Kingdom, Europe

Bronze of Margaret Thatcher beside the 1982 Liberation Monument in Stanley, Falkland Islands, South America

Auberge de Castile et Leon, the Prime Minister's office, Valletta, Malta, Europe

Auberge de Castile et Leon, the Prime Minister's office, Valletta, Malta, Europe

Auberge de Castile et Leon, the Prime Minister's office, Valletta, Malta, Europe

Auberge de Castile et Leon, the Prime Minister's office, Valletta, Malta, Europe

Armed policeman guards Number 10 Downing Street, official home of the British Prime Minister, London, UK

Armed policeman guards Number 10 Downing Street, official home of the British Prime Minister, London, UK

Policeman watches red carpet being laid outside number 10 Downing Street, the home of the Prime Minister, London, UK.

Prime Minister's London residence, 10 Downing Street, Westminster, London, England, United Kingdom, Europe

Number 10 Downing Street, official home of the British Prime Minister, London, United Kingdom

Arundells, the former home of Sir Edward Heath, a British Prime Minister, Salisbury, Wiltshire, England, United Kingdom, Europe

The intricately carved facade of the Nathmal Ki Haveli home, former residence of the prime minister of Jaisalmer and major tourist attraction in Rajasthan, India, Asia

Ho Chi Minh Mausoleum, Hanoi, Vietnam, Asia

Number 10 Downing Street, Westminster, London, England, United Kingdom, Europe

Germany, Berlin, Facade of the Bundeskanzleramt or Federal Chancellery building which is the official residence of Germany's Chancellor.