Mo. Rev. Stat. § 94.160
Upon the first day of January of each year all unpaid city taxes shall become delinquent, and the taxes upon real property are hereby made a perpetual lien thereon against all persons in favor of the city.
(RSMo 1939 § 6926)
Prior revisions: 1929 § 6780; 1919 § 8267; 1909 § 9204