Constitution of the State of Ohio Art. XII, § 2

No property, taxed according to value, shall be so taxed in excess of one per cent of its true value in money for all state and local purposes, but laws may be passed authorizing additional taxes to be levied outside of such limitation, either when approved by at least a majority of the electors of the taxing district voting on such proposition, or when provided for by the charter of a municipal corporation. Land and improvements thereon shall be taxed by uniform rule according to value, except that laws may be passed to reduce taxes by providing for a reduction in value of the homestead of permanently and totally disabled residents, residents sixty-five years of age and older, and residents sixty years of age or older who are surviving spouses of deceased residents who were sixty-five years of age or older or permanently and totally disabled and receiving a reduction in the value of their homestead at the time of death, provided the surviving spouse continues to reside in a qualifying homestead, and providing for income and other qualifications to obtain such reduction. Without limiting the general power, subject to the provisions of Article I of this constitution, to determine the subjects and methods of taxation or exemptions therefrom, general laws may be passed to exempt burying grounds, public school houses, houses used exclusively for public worship, institutions used exclusively for charitable purposes, and public property used exclusively for any public purpose, but all such laws shall be subject to alteration or repeal; and the value of all property so exempted shall, from time to time, be ascertained and published as may be directed by law.