Some instruments called "lyres" were played with a
bow in
Europe and parts of the
Middle East, namely the Arabic
rebab and its descendants, including the
Byzantine lyra. After the bow made its way into Europe from the
Middle-East, it was applied to several species of those lyres that were small enough to make bowing practical. The dates of origin and other evolutionary details of the European bowed lyres continue to be disputed among organologists, but there is general agreement that none of them were the ancestors of modern orchestral bowed stringed instruments, as once was thought. There came to be two different kinds of bowed European lyres: those with fingerboards, and those without. The last surviving examples of instruments within the latter class were the Scandinavian
talharpa and the Finnish
jouhikko. Different tones could be obtained from a single bowed string by pressing the fingernails of the player's left hand against various points along the string to fret the string. The last of the bowed lyres with a fingerboard was the "modern" ()
Welsh crwth. It had several predecessors both in the British Isles and in Continental Europe. Pitch was changed on individual strings by pressing the string firmly against the fingerboard with the fingertips. Like a violin, this method shortened the vibrating length of the string to produce higher tones, while releasing the finger gave the string a greater vibrating length, thereby producing a tone lower in pitch. This is the principle on which the modern violin and guitar work. File:Britannica Bow Earliest Crémaillère Type.png|12th century A.D. Carolingian Empire. Bowed round lyre on the
Lothair Psalter. Engraving lacks fine details in the original, such as the mechanism to adjust the tension of the bow. File:Musicians with bowed lyre, psaltery, monchord, and dancers, from the Psalterium cum Canticis ('Werdener Psalter') Berlin, Staatsbibliothek zu Berlin – Preußischer Kulturbesitz, Ms. theol. lat. fol. 561.png|1029-1050 A.D., Germany. Werner Psalter. Bowed Germanic lure (far left) File:Asaph playing bowed lyre, Winchcombe Psalter, Cambridge University Library, Ff.1.23, folio 4v.jpg|1025-1050, England. Asaph playing
bowed lyre, detail from Winchcombe Psalter, Cambridge University Library, Ff.1.23, folio 4v File:Bowed lyre from, Bayerische Staatsbibliothek Munchen, BSB, CLM 2599, folio 96v.jpg|Early 13th century A.D., Aldersbach, Germany. Bowed lyre without fingerboard from, Bayerische Staatsbibliothek Munchen, BSB, CLM 2599, folio 96v. File:Bowed lyre, from Simonovskaya Psalter, State Historical Museum, Moscow.jpg|13th century, Russia. Bowed lyre, from Simonovskaya Psalter, State Historical Museum, Moscow ==Modern lyres==