(CNN) -- An Illinois man is suing the Vatican and Pope Benedict XVI for allegedly covering up sexual abuse by a priest at a Catholic school in Wisconsin. The lawsuit demands the Vatican release the names of thousands of Catholic priests that the suit says have "credible allegations of sexual misconduct" against them. The alleged victim, who is now an adult, says he was molested by Father Lawrence Murphy while a student at St. John's School for the Deaf, according to the complaint filed in U.S. District Court in Milwaukee, Wisconsin. "The defendant, [the] Holy See, has known about the widespread problem of childhood sexual abuse committed by its clergy for centuries, but has covered up that abuse and thereby perpetuated the abuse," the suit says.
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NEW: Priest, now deceased, is believed to have molested up to 200 boys, victims advocate says
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Suit alleges a cover-up involving the priest at a Wisconsin parochial school
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Pope Benedict XVI is named in suit that alleges cover-up of sexual abuse
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The lawsuit demands the Vatican release the names of thousands of Catholic priests
Murphy, it says, was a "top fundraiser and recruiter" for the church and the "Holy See wanted to retain @placeholder's services."