Viraraghava copper plates

Viraraghava copper plates, dated 1225 CE, of Cochin, or Kottayam plates of Viraraghava Chakravartin, or Syrian Christian copper plate, or Iravi Kortann's Plate, describe the concession made by the local king Viraraghava to a merchant Iravikorttan (Syrian Christian merchant) the chief of Manikkiramam (Manigiramam) in Makotaiyar Pattinam (modern Kodungallur).
Manigiramam, along with Anjuvannam and Ainurruvar, was one of major merchant guilds in medieval south India.