Every circuit court, county court and other court of record of any county shall be held at the courthouse of such county, except where some other place is prescribed by law or lawfully appointed. When the courthouse of a county is destroyed or is not in a condition to be occupied, such court shall hold its sessions at such places as may be appointed by order of the county court. A copy of such order or warrant shall be posted by the clerk of the county court at the front door of his office, at the courthouse door, unless the courthouse has been destroyed, and at the place so appointed.