 After a period of rest and recovery , Zita found herself regularly going back to Europe for the weddings of her children . She decided to move back to the continent full @-@ time , in 1952 , to Luxembourg , in order to look after her aging mother . Maria Antonia died at the age of 96 in 1959 . The bishop of Chur proposed to Zita that she move into a residence that he administered ( formerly a castle of the Counts de Salis ) at <unk> , Graubünden in Switzerland . As the castle had enough space for visits from her large family , and a nearby chapel ( a necessity for the devoutly Catholic Zita ) , she accepted with ease . 
