BUENOS AIRES — An Argentine court convicted two Catholic priests and a former gardener of sexually abusing deaf children at a church-run school in Mendoza on Monday, in a case that has been closely watched in part because it took place in the homeland of Pope Francis.

One of the defendants, the Rev. Nicola Bruno Corradi Soliman, is an Italian priest. He served as the director of the Provolo Institute in Mendoza — which ran the school — despite having faced previous accusations of sexual abuse at the organization’s facilities in Verona, Italy, and in La Plata, Argentina.

Mr. Corradi, 83, was sentenced to 42 years in prison, and another priest, the Rev. Horacio Hugo Corbacho Blanck, 59, of Argentina, was sentenced to 45 years in prison. A former gardener at the school, Armando Ramón Gómez Bravo , 49 , of Argentina, received a sentence of 18 years.

The three defendants had each faced numerous charges and had been in prison or under house arrest since the allegations came to light three years ago. Mr. Corbacho was the only one of the three to testify; he denied the charges, and the other two defendants did not testify, according to Gustavo Stroppiana, the prosecutor in the case.