The church of St Mary-le-Bow was destroyed in 1666 by the Great Fire of London and rebuilt by Sir Christopher Wren. Although the bells were destroyed again in 1941 in the Blitz, they had fallen silent on 13 June 1940 as part of the British anti-invasion preparations of World War II. Before they were replaced in 1961, there was a period when, by the "within earshot" definition, no "Bow Bell" cockneys could be born. The use of such a literal definition produces other problems, since the area around the church is no longer residential and the noise pollution means few are born within earshot.