This collection is a supplement to Nicholas I, Patriarch of Constantinople: Letters (CFHB VI, DOT II). The two volumes together contain all the extant writings of a great Byzantine churchman, politician, and author of the first quarter of the tenth century.

Besides a few stray letters not preserved by the regular manuscript tradition, the Miscellaneous Writings include eight patriarchal documents, including the Tome of Union of 920; a brief but impressive sermon on the capture of Thessalonica in 904; extracts from a pamphlet on the famous controversy around Leo VI’s fourth marriage; and five hymns, three of which are attested as written by the patriarch, while the remaining two should more probably be assigned to a namesake.