Downing Street leads off the south-west end of Whitehall, just above Parliament Street. It was named after Sir George Downing, who built a row of houses along the street around 1680 leading west from Whitehall. Following a number of terrorist attacks, the road was closed to the public in 1990, when security gates were erected at both ends. On 7 February 1991, the Provisional IRA fired mortars from a van parked in Whitehall towards No. 10, one of which exploded in the gardens.