The Hren choirbooks comprise six large, well-preserved codices from the early seventeenth century; they are now held at the Narodna in Univerzitetna Knjižnica in Ljubljana (SI-Lnr MSS 339–44).
In 2017 the Slovenska Akademija Znanosti in Umetnosti inaugurated the series Izabrana dela iz Hrenovih kornih knjig/Selected works from the Hren choirbooks with an edition of Annibale Perini’s Missa “Benedicite omnia opera Domini” and Pietro Antonio Bianco’s Missa “Percussit Saul mille”, two works whose sole source is the Hren Choirbooks.
Both works are parody Masses: the model for Perini’s Mass is Ruggiero Giovannelli’s motet Benedicite omnia opera Domini, while that for Bianco’s Mass is the motet Percussit Saul mille by Giovanni Croce.
Above, the statue of Tomaž Hren at the Stolnica Svetega Nikolaja, where the books originated; below, Croce’s Percussit Saul mille, the basis of the Bianco work.