Palermo Astronomical Observatory

The Giuseppe S. Vaiana Astronomical Observatory is an astronomical observatory located in Palermo, Sicily, Italy, housed inside the Palazzo dei Normanni. It is one of the research facilities of the National Institute of Astrophysics. It was founded in 1790 by Ferdinand I of the Two Sicilies, at the suggestion of some intellectuals of the time, including the then Sicilian viceroy Francesco d'Aquino, Prince of Caramanico.