Explanation

10 Downing Street, colloquially known as Number 10.

It is the official residence and office of the British Prime Minister.

It located on Downing Street in London's City of Westminster.

It was constructed between 1682 and 1684 by architect Kenton Couse.

The building, over 300 years old, boasts approximately 100 rooms.

It was officially designated on 14 January 1970.