He [Pius XII] belonged to a noble family, whose sphere of relations was naturally among the nobility. In 1929, one prominent member of his family was graced with the title of marquis; and the Pope’s nephews, Don Carlo Maria, Don Marcantonio, and Don Giulio Pacelli, each received the hereditary title of prince from King Victor Emmanuel III of Italy.
There was something imponderable in that Pope which evoked nobility: his tall, slim bearing, his way of walking, his gestures, even his hands. This Pontiff, so universal in spirit and so friendly to the lowly and poor, was also very Roman and had his attention, consideration, and affection also turned toward the Roman Nobility.
Plinio Corrêa de Oliveira, Nobility and Analogous Traditional Elites in the Allocutions of Pius XII: A Theme Illuminating American Social History (York, Penn.: The American Society for the Defense of Tradition, Family, and Property, 1993), 21.