With the fall of Malta to Napoleon the King of Spain imposed his own rule over the four Spanish priories. When the Treaty of Amiens threatened to restore their independence he king promptly converted them into the the royal Order of St. John, by a royal decree of January 1802. After the first Carlist War (1833-1839)i the governement of Queen Isabella confiscatedall church property, and so Sijena lost all of its possessions, the monastry itself was sold, and although the buyer allowed the nuns to remain they were forced to subsist on their own dowries. The nuns did eventually manage to regain possession of their house, but not their estates.
The nuns of Sijena continued their traditional way of life until the outbreak of the Civil War, when a group of republicans from Barcelona set fire to the convent destroying all the magnificent tombs and buildings adorned over centuries. An order of French nuns has established a community in the ruins.