He was the brother of Italian scientist and economist Luca de Samuele Cagnazzi and, after the premature loss of their father, their father's friend Carlo de Marco took care of the two siblings, especially their education, in order to ensure them a prestigious careers in politics.
During the Altamuran Revolution (1799), Giuseppe Cagnazzi, according to the extensive research carried out by historian Vincenzo Vicenti,[3] joined it and then he left the Altamura in order to escape death.
[6][7] Historian Vincenzo Vicenti managed to find a source in which Giuseppe Cagnazzi wrote that she was victim of "the bloody horrors of the brigands", which caused her premature death"[3] When Joseph Bonaparte ascended the throne of the Kingdom of Naples, he was rehabilitated and received prestigious public positions, first in the customs department and later in the tobacco industry.
[1] In Avellino, Giuseppe Cagnazzi was also asked to teach mathematics to the children of some notable French officers.
"He Reciped instrumental productions by renowned French and German authors and invited talented teachers, such as Vincenzo Bellini".