A composite of four drawings from the <a href="https://en.wikipedia.org/wiki/Utrecht_Psalter" class="extiw" title="w:Utrecht Psalter">Utrecht Psalter</a> showing the evolution of the cithara into the guitar. The images in order left to right are from <a href="//commons.wikimedia.org/wiki/File:Utrechts-Psalter_PSALM-149-PSALM-150_timpanum_drum_psalterio.jpg" title="File:Utrechts-Psalter PSALM-149-PSALM-150 timpanum drum psalterio.jpg">Psalm 150</a>, <a href="//commons.wikimedia.org/wiki/File:Cithara_from_Utrecht_Psalter_Psalm_42.jpg" title="File:Cithara from Utrecht Psalter Psalm 42.jpg">Psalm 42</a>, <a href="//commons.wikimedia.org/wiki/File:Utrechts-Psalter_PSALM-145-PSALM-146_lyre_and_cythara.jpg" title="File:Utrechts-Psalter PSALM-145-PSALM-146 lyre and cythara.jpg">Psalm 145</a>, and <a href="//commons.wikimedia.org/wiki/File:Utrechts-Psalter_PSALM-80_cithara_and_harp.jpg" title="File:Utrechts-Psalter PSALM-80 cithara and harp.jpg">Psalm 80</a>.
Unknown author<span style="display: none;">Unknown author</span>
1911
1911 Encyclopædia Britannica, Vol. 12, p. 704