No. 10 Downing Street, and the rest of the street actually, are today's topic. I'll cover:

Why Downing Street is famous,

How Downing Street was built,

Who built Downing Street and why,

Cocks and the Germans,

Sir Robert Walpole's contribution,

How No. 10 was a merger of various houses

How PMs have used 10 Downing Street,

How numbers 11 and 12 also came to be used,

How Balfour began PMs using the house as their primary residence,

That black door,

Renovations and refurbishments,

Mortar attacks by the IRA,

How PMs adapt the building to their needs,

Other little tidbits.