hello! wow you are really interested... and what a detailed question!
I'll try to answer... the B. family, from what I know, had sovereign rights over the small territory of the lake Maggiore (where the famous islands are) and surroundings, they were one of the many noble family in Italy (the country was then divided in many small and bigger indipendent "micro-states" (dutchies, fiefs, counties...). The duchy of milan was indipendent and ruled by the Visconti dukes, before the spanish and then the austrians defeated them and took over. Yes they were quite influential and rich (the most famous archbishop of Milan was a Borromeo, and the castle contains a lot of art pieces of great value), but the difference from the other families you mention is that those were in Rome, where the center of the power was, because of the state of the Chuch and the Popes.
I hope my information is clear...and is what you wanted to know!
As for me...I'm from Venice!
Very clear, griet! And thank you very much!
I'll see if I can find any mention of the Borromeo family when the Spanish and Austrian Habsburgs ruled Milan. So far I have not encountered the family name yet at the Viennese court, where the most influential noble families from Milan, Mantua, Parma and Tuscany were also attached in various capacities.... Perhaps Borromeo family's influence declined when the Habsburgs ruled over the duchy? But I still have to read about the rule of Archduke Ferdinand (1754-1806), son of Empress Maria Theresa, who was Governor of Milan.
You're from Venice, Empress Maria Theresa's children loved Venice, they met up there for family holidays (Joseph, Maria Amalia, Leopold, Ferdinand, and Maximilian; Maria Amalia had many friends in Venice and the brothers - together with their brother-in-law Duke Ferdinand of Parma - also watched the regatta there!).
What you shared is a great start, so again, thanks!
Seems like Pierre's girlfriend Beatrice is indeed from a very prestigious lineage - I read (in Wikipedia! not always reliable) that the Casiraghi family is also a minor noble family in Milan -- that seems a bit of a stretch for me! I did not find the name Casiraghi in the Libro d'Oro della Nobilta de Mediterranea
, for instance. I know it said "minor" but still.... it's probably just the sugars trying to make the Casiraghis "better".
why is beatrice borromeo "irritating"? my italian is only limited to reading skills so I wouldn't know if she is irritating as a television personality?