John Le Decer

John Le Decer (died 1332)[1] was a fourteenth-century Mayor of Dublin, who had a notable record of charitable works and civic improvement.

[6][7] This held Dublin's main water conduit in Cornmarket, adjacent to St. Audoen's Church in the centre of the medieval city, a work "such as was never seen here before".

He set up Dublin's so-called "Lucky Stone" (a ninth-century grave marker) there, reputedly so that everyone who drank from the cistern should have good luck; it had previously been situated inside St Audoen's.

[11] He also built "at great expense" a bridge over the River Tolka at Ballybough, northeast of Dublin city, in 1313, but this was destroyed by floods not long afterwards.

[13] He was also generous in his support for religious houses,[1] paying for the building of a new chapel in the Priory of Kilmainham, and for extensive works in the Monastery of Saint Francis.