 While at Parma he did much experimental work in physics with apparatus specially constructed by two of his assistants.After pronouncing his solemn vows on 2 February 1742, Belgrado was summoned to the court, where he was appointed confessor, first to the Duchess, and later to the Duke Don Philippo, The title of mathematician of the court was also bestowed on him.He 1757 he erected an observatory on one of the towers of the college of Parma and furnished it with the necessary instruments.