Traditionally, a bishop would be addressed as “Your Excellency” and an archbishop as “Your Grace,” and in other English speaking countries outside North America, it is often “Your Lordship” or “My Lord” (the English definition of the Italian “Monsignor”) Most American bishops, particularly those in the west, seem to prefer to be addressed as (Arch)Bishop N., and the customary kissing of his ring is fairly rare west of the Mississippi, although it is common elsewhere in the world. In writing, however, I would address the bishop as “Your Excellency.”