The Roman Catholic Diocese of Thiès (Latin: Thiesin(us), French: Diocèse catholique romain de Thiès) is a diocese located in the city of Thiès in the ecclesiastical province of Dakar in Senegal.

On Friday, January 18, 2013, Pope Benedict XVI named the Rev.

André Gueye as Bishop-designate of the Roman Catholic Diocese of Thiès, to be ordained and installed at a date in the near future (which would be May 25).

Up until then, he had been serving as a member of the Thiès diocesan clergy, and as a professor of philosophy at the Major Seminary of Saint Jean Marie Vianney in Bris, Senegal (in the Roman Catholic Diocese of Ziguinchor in Ziguinchor, Senegal).

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