Mo. Rev. Stat. § 88.897

Any and all real property shall be liable for the cost of the improvements contemplated in sections 88.863 to 88.913, as above provided, whether owned by a person, a company, a corporation, a railroad corporation or company, a church, a charitable institution, educational institution, eleemosynary institution, cemetery or cemetery association, or any other institution or association whatever, except real estate owned by the state of Missouri or by any state institution, or by the United States, or by any county, township or city, and the tax bills so issued on any and all property, except those last named and excepted, shall be and constitute a first and prior lien against the property described therein, and second only to the lien of state, county and city taxes, and said lien shall continue for a period of three years after the maturity of each or any of said tax bills, or until the final determination of any legal proceedings to collect the same.