The Byzantine lyra or lira was a medieval bowed string musical instrument in the Byzantine Empire. In its popular form, the lyra was a pear-shaped instrument with three to five strings, held upright and played by stopping the strings from the side with the fingertips and fingernails. The oldest known depiction of the instrument is on a Byzantine ivory casket, dated to circa 900–1100 AD, preserved in the Bargello in Florence. Modern variants of the lyra are still played throughout the Balkans and in areas surrounding the Black Sea, including Greece, Crete, Karpathos, Albania, Montenegro, Serbia, Bulgaria, North Macedonia, Croatia, Italy, Turkey and Armenia.

Medieval music encompasses the sacred and secular music of Western Europe during the Middle Ages, from approximately the 6th to 15th centuries. It is the first and longest major era of Western classical music and is followed by the Renaissance music; the two eras comprise what musicologists generally term as early music, preceding the common practice period. Following the traditional division of the Middle Ages, medieval music can be divided into Early (500–1000), High (1000–1300), and Late (1300–1400) medieval music.