Bernard Gui (1260-1331) was a Friar-Preacher perhaps best known as an Inquisitor against the Albigensians (or Cathars). He ended his career as Bishop of Lodève. This manuscript (R.4.23) includes various works by Bernard, but we are highlighting the beautifully illustrated genealogical tree - Arbor genealogie regum - which traced the lineage of the French Kings …
