Wis. Stat. § 70.01
Taxes shall be levied, under this chapter, upon all general property in this state except property that is exempt from taxation. Real estate taxes and personal property taxes are deemed to be levied when the tax roll in which they are included has been delivered to the local treasurer under s. 74.03. When so levied such taxes are a lien upon the property against which they are charged. That lien is superior to all other liens, except a lien under s. 292.31(8) (i) or 292.81, and is effective as of January 1 in the year when the taxes are levied. Liens of special assessments of benefits for local improvements shall be in force as provided by the charter or general laws applicable to the cities that make the special assessments. In this chapter, unless the context requires otherwise, references to "this chapter" do not include ss. 70.37 to 70.395.
Wis. Stat. § 70.01
The enactment of this chapter did not supersede the Milwaukee city charter, which exempts from taxation property leased by the city. City of Milwaukee v. Shoup Voting Machine Corp., 54 Wis. 2d 549, 196 N.W.2d 694 (1972). Property held in trust by the federal government for the Menominee tribe and tribal members is not subject to state taxation. 66 Atty. Gen. 290.