The cimbalom is a concert hammered dulcimer: a type of chordophone composed of a large, trapezoidal box with metal strings stretched across its top. It is a musical instrument commonly found in Hungary and throughout the group of Central-Eastern European nations and cultures which composed Austria-Hungary (1867–1918), namely contemporary Hungary, Croatia, Romania, Moldova, Ukraine, Poland, the Czech Republic and Slovakia. It is also popular in Greece. The cimbalom is (typically) played by striking two beaters against the strings. The steel treble strings are arranged in groups of 4 and are tuned in unison. The bass strings which are over-spun with copper, are arranged in groups of 3 and are also tuned in unison. The Hornbostel-Sachs musical instrument classification system registers the cimbalom with the number 314.122-4,5. Moreover, the instrument name “cimbalom” also denotes earlier, smaller versions of the cimbalom, and folk cimbaloms, of different tone groupings, string arrangements, and box types. In English, the cimbalom spelling is the most common, followed by the variants, derived from Austria-Hungary’s languages, cimbál, cymbalom, cymbalum, tambal, tsymbaly and tsimbl etc. Santur, Santouri, sandouri and a number of other non Austro-Hungarian names are sometimes applied to this instrument in regions beyond Austria-Hungary which have their own names for related instruments of the hammer dulcimer family.