the 1st champion ship was named CAMPEONATO DE PORTUGAL the winners were as follows 1921-22 porto 1922-23 sporting 1923-24 olhanense 1924-25 porto 1925-26 CLUB SPORT MARITIMO 1926-27 belenenses 1927-28 carcavelinhos 1928-29 belenenses 1929-30 benfica 1930-31 benfica 1931-32 porto 1932-33 belenenses 1933-34 sporting 1934-35 benfica 1935-36 sporting 1936-37 porto 1937-38 sporting then it changed to 1 liga e nacional da 1 divisao which started in 1934-35 season they played both for 2 years side by side 1934-35 was won after 36/38 check below http://www.fpf.pt/historial/provas_1liga_1divisao.html