Michigan constitution
Article VI
Section 13

The circuit court shall have original jurisdiction in all matters not prohibited by
law; appellate jurisdiction from all inferior courts and tribunals except as otherwise provided
by law; power to issue, hear and determine prerogative and remedial writs; supervisory and
general control over inferior courts and tribunals within their respective jurisdictions in
accordance with rules of the supreme court; and jurisdiction of other cases and matters as
provided by rules of the supreme court.