The Coignard was a convent of Canonesses founded in Paris on 7 October 1647 (the anniversary of the Battle of Lepanto in 1571) and dedicated to Saint-Augustin de la Victoire-de-Lépante. Its site is in the corner of what is now boulevard Diderot with rue de Picpus.
In March 1794, the convent was confiscated and converted into a 150 bed prison hospital during the French Revolution - the prison's cemetery is the Picpus Cemetery. The most notorious prisoner at Coignard was the Marquis de Sade.[1]