The Deák–Szentes manuscript includes the most important melodies of the second part of the hymn text collection Cantionale catholicum, compiled by the Franciscan János Kájoni (Ioan Căianu) in 1676, and revised by Balás Ágoston for a new edition in 1719.
These tunes preserve the Székely hymn tradition of Csík, Transylvania, in the customary notation of the 18th century. Along with the songs from Kájoni’s Cantionale, the manuscript contains Masses, Kyries, Baroque hymns, and traditional hymn texts.
Although today the manuscript is incomplete, it has been reconstructed with the help of earlier copies for a new edition: A Deák-Szentes kézirat/The Deák–Szentes manuscript, edited by Réka Kővári (Budapest: Magyarok Nagyasszonya Ferences Rendtartomány, 2013).
Below, a selection from the Cantionale catholicum.