Between Medieval and Folk

Stuever: Catholics don't argue about abortion or the death penalty nearly as much as they argue about what music is sung (or not sung, or used to be sung) at their local Sunday Mass. It was ever thus -- at least since the 1960s, when Sister first shortened her habit, strummed a G7 chord and, to hear some Catholics tell it, all heck broke loose.

Among his more fastidious devotees, Pope Benedict XVI is valued most for the fact that he is not Casey Kasem, and Mass is no place for a hit parade, and church is most relevant when it is serious. (The point of this trip is just that: G et serious.) Do not hold your breath waiting for "One Bread, One Body" -- a '70s liturgical hit at most American parishes -- to be performed at His Holiness's mega-Mass tomorrow at Nationals Park.

But don't listen for too many sacred hits of the 10th century either. While Benedict understands the deep power of ritual, and loves little more than a Gregorian chant, what he and 46,000 others will be singing (or not singing) tomorrow will be a sort of compromise, neither modern nor traditional, but a little of everything. As soon as tomorrow's Mass playlist hit the Web, the new traditionalists were fuming on blogs and comment threads. (The pre-show includes African hymns, a "celebratory merengue" and some Mozart; the Mass itself includes a gospel-style Kyrie, some traditional Latin chants and several new interpretations of standard hymns.)