Onyx: Kings of the Grail
- Joer: 2019
- Land: Spain
- Genre: Documentary, History
- Studio: Sevenfor
- Schlësselwuert: based on novel or book, holy grail, docudrama, semi-documentary, jesus christ
- Direkter: Roberto Girault
- Besetzung: Jim Caviezel, Maria de Medeiros, Anthony Howell, Ricard Sales, Maarten Dannenberg, Rafael Rojas