St Mary-le-Bow is a historic church in the City of London on the main east-west thoroughfare, Cheapside. According to tradition a true Cockney must be born within earshot of the sound of Bow Bells (which refers to this church's bells rather than St Mary and Holy Trinity, Bow Road, in Bow, which until the 19th century was an outlying village).
More information on the Wikipedia page [1]. The website is [2].