On Budget day the entire nation's attention focuses on the Chancellor of the Exchequer leaving 11 Downing Street with his famous red Budget box. This booklet takes us behind the townhouse facade of number 11 into a building of historical and architectural importance, which is also the Chancellor's family residence. Built in the late 17th century on land acquired by Sir George Downing, the house has undergone various structural alterations. The booklet outlines all these changes as well as looking at number 11's dual role as official residence and family home. It depicts the cartoons of former chancellors that line the staircase, and gives us a glimpse of the Chancellor's private apartments with their fine views over St James' Park.