Neil MacCarthy, the Toronto archdiocese’s communication director, said Archbishop Thomas Collins requested a fourth auxiliary bishop so the archdiocese could return to its traditional “roster” (there had been four regions in the past) and to help with the overall management of the diocese. Before the change, Bishop Peter Hundt had been in charge of the northern and eastern region, which covered an area stretching from the shores of Lake Ontario in Durham region up to Penetanguishene on the shores of Lake Huron.

“To be able to pastorally respond to more than 220 parishes is a challenge and another bishop will help with the sheer management of the size of the diocese,” MacCarthy told The Catholic Register in an e-mail.

The regional assignments will be as follows:

Bishop John Boissonneau will head the western region (encompassing Etobicoke and the parishes west of Toronto), in addition to his duties as vicar for Catholic education, vicar for liturgy, liaison with Catholic university chaplaincies and liaison with theological faculties	Bishop Peter Hundt will look after the northern region (north of Toronto to Huronia), as well as being vicar for religious and responsible for the Pastoral Mission Fund and the Missionary Co-Operative
Bishop William McGrattan will oversee the city of Toronto in the central region, as well as be the vicar for ethnic communities and liaison with lay movements	Bishop Vincent Nguyen will be the first regional bishop of the new eastern region (encompassing Scarborough and Durham region), and will also be chancellor of the archdiocese, moderator of the archdiocesan curia and vicar for deacons