Yes, the government took your property. But it wasn't an exercise of its eminent domain authority. When you don't pay your tax bills, the government can foreclose on your property, and sell it. Which it did. Inverse condemnation complaint dismissed.
Epice Corp. v. Land Reutilization Auth. of the City of St. Louis, No. 4:07CV00206 (E.D. Mo., Aug. 17, 2010) ("The Court agrees with these courts in finding that the foreclosure of a tax lien
involves the taxing power, not the eminent domain of the government.").