Sorry. I seem to have missed a couple of posts up above.

GUEST is right that Ambrosian Chant preceded Gregorian Chant (both are "plainsong" or "plainchant" according to the normal definition).

500-600 - FALSE. The ritual music of the early Christian Church, as distinct from later polyphonic music, consisted of unaccompanied melodic lines deriving from natural intonation, with flexible rhythms to fit the Latin prose of the daily services. Probably initially influenced by Jewish liturgical chant, its melodic basis derived from the Greek system of modes. At the end of the 6th century, during the papacy of Gregory I, it was codified as Gregorian chant. Earlier codifications included Ambrosian Chant, a type of plainsong now lost, associated with St Ambrose, Bishop of Milan 374-397, who reorganized singing and tonality in the Christian church.

On the Cithara (guitar), I'd advise that (particularly with early dates) I'm sometimes a bit tongue in cheek and I try not to be too pedantic about the questions anyway.

German's a good start for the Morality Play (which might not be so tough to track down with a little collaboration) ... a hint from one person might well lead to a solution from another, so where's Wolfgang?

As for looking things up ... well, there's the whole internet in front of you so keep up the good work!!!

:-)