It is the duty of the janitor of the city building to have charge of, and care for, under the direction of the Committee on Finance of the Common Council, the city building; to keep same clean, in good order, warmed by fire, and lighted during the hours required by Council, or any Committee thereof; and to perform the duties required of him, by municipal ordinance, resolution, or other action of the Council, or the orders of the Finance Committee.
('66 Code, § 33.06)