Red Lion Square is a small square in Holborn, London. The square was laid out in 1684 by Nicholas Barbon, taking its name from the Red Lion Inn. According to some sources the bodies of three regicides—Oliver Cromwell, John Bradshaw and Henry Ireton—were placed in a pit on the site of the Square. A notable resident of the square was John Harrison, the world renowned inventor of the marine chronometer, who lived at number 12, where he died in 1776. There is a blue plaque dedicated to him on the corner of Summit House.