caption father death_date death_place mother birth_place birth_date spouse issue image article_title name
prince sixtus around 1930 robert i , duke of parma 14 march 1934 paris , france infanta maria antonia of portugal schloss wartegg , canton of st. gallen , switzerland 1 august 1886 hedwige de la rochefoucauld princess isabella prince_sixtus_of_bourbon-parma . jpg prince sixtus of bourbon-parma
 prince sixtus
prince sixtus of bourbon-parma

prince sixtus of bourbon-parma -lrb- 1 august 1886 -- 14 march 1934 -rrb- was a son of robert i , the last reigning duke of parma .
he was a prince of the parmesan branch of the royal house of bourbon ; a belgian officer in world war i ; and the central figure in the sixtus affair , an attempt to negotiate a treaty to end austria-hungary 's participation in the great war separate from its central powers allies .
he also wrote a number of books .
