 It is now suffragan of the archdiocese of Mechelen-Brussels.The cathedral is Notre-Dame de Tournai which has been classified both as a Wallonia's major heritage since 1936 and as a World Heritage Site since 2000.As early as the second half of the 3rd century St. Piat evangelized Tournai; some sources name him as the first bishop, but this remains unsubstantiated.