The Archbishop is the top of a diocese or archdiocese within the Catholic Church. He’s accountable for the religious and administrative management of his diocese or archdiocese. As an indication of respect, you will need to tackle the Archbishop in a proper and respectful method.
The proper approach to tackle the Archbishop is “Your Grace.” That is adopted by his final identify. For instance, if the Archbishop’s final identify is Smith, you’d tackle him as “Your Grace, Archbishop Smith.”