The Lex Hieronica was a unique system of regulations concerning the agricultural taxation of Sicily by the Roman Republic. The taxation system was named after King Hiero II of Syracuse. The basic provision requires that farmers pay ten percent of their produce in tax to Rome. It is likely that the Lex Hieronica was an appropriation of both Hiero II's taxation system of his Kingdom and the Carthaginian taxation system of western Sicily. The date of establishment of the law is uncertain. It was likely implemented sometime in between the first two Punic wars.