Thomas Rosica

20th and 21st century American Catholic priest

Thomas Michael Rosica, C. S. B. (born March 3, 1959) is an American Catholic priest, author, and Basilian Father. He was formerly chief executive officer of Salt + Light Catholic Media Foundation, English language media attaché of the Holy See Press Office, and president of Assumption University in Windsor, Ontario. He resigned from Salt + Light and other positions in 2019 following substantiated allegations of plagiarism.

Rosica was appointed by the Canadian Conference of Catholic Bishops as the national director and chief executive officer of the 17th World Youth Day 2002 in Toronto. The theme of the World Youth Day was "You are the salt of the earth you are the light of the world." Shortly after the World Youth Day, Thomas Rosica was approached by the founder of St. Joseph Communications, Gaetano Gagliano, to run a religious television network. The new television station was named "Salt + Light Television" after the theme of the World Youth Day 2002 and began its broadcast on July 1, 2003 with only two employees.

Since 2015, Rosica has regularly been accused of plagiarism in his publications, blog postings, and speeches. On February 17, 2015 Rosica issued a cease and desist letter against David Domet, of the Catholic blog Vox Cantoris, accusing the blogger of having made false and defamatory statements. In February 2019, Rosica stepped down from the governing boards of University of St. Michael's College in Toronto, St. John Fisher College in New York and University of St. Thomas in Houston because of plagiarism accusations. In March 2019, Rosica went on sabbatical from the Salt and Light Catholic Media Foundation; he resigned as CEO in June. That same month, the Canadian Conference of Catholic Bishops announced that it had retracted Rosica's works published by the CCCB because the works "failed to provide all the appropriate citations, as well as bibliographic references, and did not acknowledge a number of original sources". Rosica took full responsibility for the "lack of oversight." In 2022, new plagiarism accusations were brought against Rosica concerning two new articles published in Il Sismografo, a Vatican based news aggregator.