UEFA Champions League:
It is seasonal competition organized by UEFA for most successful clubs in Europe. Barcelona won that Champions League twice in: 1991-92, 2005-06.
UEFA Cup Winners Cup was a football competition contented annually by most recent winners of all European domestic cup competitions. Barcelona is most successful team on that competition and won 4 times in: 1978-79, 1981-82, 1988-89, 1996-97.
Fair Cup was a European football competition played between 1955 and 1971. Barça won it 3 times in: 1957-58, 1959-60, 1965-66.
UEFA Super Cup is at stake in an annual football game between the reigning champions of the UEFA Cup and the Champions League. It takes place at the start of the domestic season. Barcelona won it twice in: 1992-93 and 1997-98.
Spanish League Championship:
The original name of Spanish League Championship is Primera División. Barcelona won the trophy 18 times in:1928-29, 1944-45, 1947-48, 1948-49, 1951-52, 1952-53, 1958-59, 1959-60, 1973-74, 1984-85, 1990-91, 1991-92, 1992-93, 1993-94,1997-98, 1998-99, 2004-05, 2005-06.
Spanish Cup:
The original name of Spanish cup is Copa del Rey. Barcelona won 24 times that trophy which makes Barça most successful team in that cup. Barcelona won that trophies in: 1909-10, 1911-12, 1912-13, 1919-20, 1921-22, 1924-25, 1925-26, 1927-28, 1941-42, 1950-51, 1951-52, 1952-53, 1956-57, 1958-59, 1962-63, 1967-68, 1970-71, 1977-78, 1980-81, 1982-83, 1987-88, 1989-90, 1996-97, 1997-98.
Spanish Supercup:
The original name of Spanish Super Cup is Supercopa de España. The Spanish Supercup is championship contested by winners of La Liga and Copa del Rey. Barcelona won it 7 times in 1983-84, 1991-92, 1992-93, 1994-95, 1996-97, 2005-06 and 2006-07.
