Carlo Francesco Gabba (April 14, 1835, in Lodi – February 18, 1920, in Turin) was an Italian jurist and professor at the University of Pisa who has received several awards and titles.
His studies and legal constructions deeply influenced the law in several countries.
In 1897 he was police of Italian government at the International Congress in Brussels about protection of the industrial property and in 1899 advisor on diplomatic conflicts by the Ministry of Foreign Affairs.
In 1899 he was advisor on diplomatic conflicts to the Italian Ministry of Foreign Affair Elected senator in 1900, he was an ordinary member of the Standing Committee of the Superior Court of Justice and member of the Turin National Academy of Sciences.
Gabba left behind the concept of legal principle acquired right, in his most famous book Teoria della retroattività delle leggi (Theory of retroactive legislation, Turin, 1891).