Neither Duarte Nuno nor his father were born in Portugal , but Emperor Franz Josef I of Austria had granted extraterritoriality to Duarte Nuno 's birthplace .
Duarte Nuno 's grandfather had been sent into exile by the law of 19 December 1834 .
Neither Duarte Nuno nor Duarte Nuno 's father were born in Portugal , but Emperor Franz Josef I of Austria had granted extraterritoriality Duarte Nuno   Nuno 's birthplace .
Duarte Nuno 's grandfather had been sent into exile by the law of 19 December 1834 .