The Clavis nigra (Black Key) database captures polyphonic music from sources of the Czech lands, recorded mostly by means of black mensural notation. Work on the database relied on a manuscript – a catalogue of polyphonic music penned by a leading musicologist, doc. PhDr. Jaromír Černý, CSc. Compositions can be searched for by parts of title or melodic code. For each entry found, the textual incipit of the composition, location within the source (signature, folio), type (motet, song, number of voices) and melodic code are displayed. The entries are accompanied by scans of Jaromír Černý’s catalogue cards.

• Person responsible for administration of information source:
  Jiří Žůrek (zurek@ics.cas.cz)
• Current content of information source:
  1,936 catalogue entries
• Listings have associated digital objects:
  Yes
• Format of digital objects:
  pdf
• Online access:
  http://www.clavmon.cz/clavis_nigra/index.htm