The Village of Euclid (Euclid) (defendant) adopted an ordinance establishing a comprehensive zoning plan (the ordinance). The ordinance divided the area of Euclid into six classes of use districts, U-1 to U-6. Use restrictions were cumulative, meaning that permitted uses in the U-2 district included those permitted in the U-1 district, and so on. U-1, the most restricted district, was limited to single-family homes. The U-2 district permitted two-family dwellings, and the U-3 district permitted multi-family housing. U-6, the least restricted district, included industrial and manufacturing activities. Ambler Realty Company (Ambler) (plaintiff) owned 68 acres of vacant land in Euclid. Ambler sought to sell and develop the land for industrial purposes, but portions of the land were zoned so as to prohibit industrial use. Ambler brought suit against Euclid, contending that the ordinance resulted in an unconstitutional taking of private property without compensation.