Una Voce (Engl.: "With One Voice" from the Preface to the Roman Canon) is an international federation of Catholic lay organizations attached to the Tridentine Mass, the liturgy that was codified at the Council of Trent in 1570 and remained the normative Roman rite for nearly 400 years until Vatican II. Una Voce was founded in 1966 and currently includes organizations from twenty-eight countries world-wide.

Marcel-François Lefebvre, better known as Marcel Lefebvre, was a French prelate of the Roman Catholic Church who took a leading part in opposing the changes within the Church associated with the Second Vatican Council. In 1970 he founded the Society of St. Pius X, for which on 30 June 1988 he consecrated four bishops. On the Holy See's declaration that he was thereby automatically excommunicated, and the subsequent questioning of that declaration, see, …

Black Veil, in the Roman Catholic Church, the symbol of the most complete renunciation of the world and adoption of a nun's life. On the appointed day the nun goes through all the ritual of the marriage ceremony, after a solemn mass at which all the inmates of the convent assist. She is dressed in bridal white with wreath and veil, and receives a wedding-ring, as a "Bride of Christ". Afterwards she presides at a wedding breakfast, at which a bride-cake is cut.

"His Excellency" Antônio de Castro Mayer, STL (June 20, 1904-April 25 1991) was a German-Brazilian prelate of the Roman Catholic Church. A Traditionalist Catholic and ally of Archbishop Marcel Lefebvre, he was Bishop of Campos from 1949 until his resignation in 1981.

Most Reverend Robert William Finn (born April 2, 1953, St. Louis, Missouri) is the current bishop of the Roman Catholic Diocese of Kansas City-Saint Joseph, having succeeded Raymond James Boland on May 24, 2005. Prior to his present appointment, Msgr. Finn was incardinated as a priest in the Archdiocese of Saint Louis. Having applied for membership in Opus Dei in January 2004, …

Dom Prosper Louis Pascal Guéranger was a Benedictine priest and abbot of Solesmes. Dom Guéranger was the author of "The Liturgical Year", which covers every day of the Catholic Church's Liturgical Cycle. It is a set of 15 volumes. Guéranger, the Abbot of Solesmes, restored the Priory of Solesmes. Guéranger was well regarded by Pope Pius IX, and was a proponent of the dogmas of papal infallibility and the Immaculate Conception.

Cardinal Alfons Maria Stickler, SDB, JCD (born August 23, 1910) is an Austrian prelate of the Roman Catholic Church. He served as Archivist of the Vatican Secret Archives and Librarian of the Vatican Library from 1985 to 1988. Stickler was elevated to the cardinalate in 1985, and is currently the oldest member of the College of Cardinals. A conservative, he is a strong supporter of the Tridentine Mass and clerical celibacy.

Kurt Koch, ThD (born March 15, 1950) is a Swiss prelate of the Roman Catholic Church, currently serving as Bishop of Basel. Born in Emmenbrücke, he was ordained to the priesthood on June 20, 1982. On August 21, 1995, Koch was elected Bishop of Basel and was confirmed as such by Pope John Paul II on the following December 6. He received his episcopal consecration on January 6, 1997 from John Paul II himself, …

Father Alfred Kunz, (April 15, 1931 - March 4, 1998), was a traditionalist Catholic priest who was found with his throat slit open in his Roman Catholic church in Dane, Wisconsin. His murder has never been solved. Kunz, though he continued to say the Latin Mass, also said the Mass in English and was in communion with his diocesan bishop, unlike many traditionalist Catholics movement. "Father Kunz was a well-known expert in canon law, …

Licinio Rangel was a bishop of the Catholic Church from Campos, Brazil. He was validly consecrated a bishop, although without papal mandate, on July 28, 1991 at São Fidelis in Rio de Janeiro, Brazil, Bernard Tissier de Mallerais, assisted by Alfonso de Galarreta and Richard Williamson (all three from Society of St. Pius X). He succeeded bishop Antônio de Castro Mayer in 1991 as superior of the Priestly Society of Saint John Mary Vianney, …

Ignatius Pin-Mei Cardinal Kung (Simplified Chinese: 龚品梅; Traditional Chinese: 龔品梅; Hanyu Pinyin: Gōng Pǐnméi; Wade-Giles: Kung P'in-mei) (August 2, 1901-March 12, 2000) was the Roman Catholic bishop of Shanghai in China from 1950 until his death, spending 30 years in Chinese prisons for defying attempts by China's communist government to control Roman Catholics through the state-run church.

Abbott Ryan St. Anne Scott, OSB (1953 -), born Randall Dean Stocks, is a traditional Roman Catholic Priest currently living in Galesburg, Illinois. In August of 2003 he converted a former hospital into Holy Rosary Abbey, an independent Benedictine monastery. Ryan St. Anne Scott belongs to a Catholic movement that does not recognize the changes that took place in the Roman Catholic Church following Vatican II, such as the elimination of the Latin Mass.

Pope St. Pius V (January 17, 1504 - May 1 1572), born Antonio Ghislieri, from 1518 called Michele Ghislieri, was Pope from 1566 to 1572 and is a saint of the Roman Catholic Church. Involved early on in the Inquisition, as Pope he resisted the influence of Protestants.