 He drew up (in Italian) the constitutions and estatutes of the order (1674).Nicolas Cotoner continued the work on the redecoration of St. John's Co-Cathedral commenced by his brother, Rafael, and much of the splendour of the Cathedral occurred during his reign including the decoration of the vault painted by the Calabrian artist Mattia Preti as well as much of the carving and gilding of most of the walls.He died on 29 April 1680 and is buried in the Chapel of Aragon in the Co-Cathedral.