The National Bank of Ukraine has issued four banknote series since 1996. All banknotes in denominations of ₴1, ₴2, ₴5, ₴10, ₴20, ₴50, ₴100, ₴200, ₴500 and ₴1,000 issued after 2003 (of the third and fourth series) are considered legal tender. All of them depict an important person in Ukraine's history on the obverse and a landmark place on the reverse. The lowest four denominations are no longer issued in banknotes and are intended to be gradually substituted by coins, though they remain common. There have been four commemorative banknote issues.