This Business Law Assignment discusses the sources of Irish law, jurisdiction of the High Court and Circuit Court of Ireland, and differences between civil and criminal law. The sources of Irish law include common law, equity, constitution, and European Union law. The High Court has full powers and jurisdiction to determine the laws and facts of the cases related to criminal as well as civil law. The Circuit Court has limited power to listen to those civil cases where the value of the claim does not exceed €75,000 and further market value is or less than €3,000,000. Criminal law deals with those matters in which one party states, whereas in civil law, those cases come in which both of the parties to a case are private persons.