Ala. Const. art. VI, § 144

There shall be a probate court in each county that shall have general jurisdiction of adoptions and the power to grant letters testamentary, and of administration, and of guardianships, and shall have such further jurisdiction as may be provided by law, provided, that whenever the circuit court has taken jurisdiction of the settlement of any estate, it shall have power to do all things necessary for the settlement of such estate, including the appointment and removal of administrators, executors, guardians, and trustees and including action upon the resignation of either of them.