The Mass with Christmas hymns, Missa carminum is available from Carus in a orchestra version and in a version for choir and organ. The unique feature of this work is that each movement of the Ordinary employs a wellknown Christmas hymn as an instrumental cantus firmus. In the score the text of each hymn has been included in the appropriate passage, so that the Christmas signature tune may be performed vocally, for example, by a onepart children’s choir.