Thomas of Cana copper plates

The Thomas of Cana copper plates (Malayalam: Knai Thoma Cheppedu), or Knanaya copper plates, dated variously between 345 C.E. and 811 C.E., are a lost set of copper-plate grants issued by the unidentified Chera/Perumal king of Kerala "Co-qua-rangon" to Syriac Christian merchants led by Knai Thoma (anglicized as Thomas of Cana) in the city of "Makotayar Pattinam" (present day Kodungallur), south India. The royal charters were reportedly engraved in ”Malabar”, syriac and Arabic on both sides of two copper plates (joined by a ring).

Source: Wikipedia — Thomas of Cana copper plates (CC BY-SA 4.0)