Reges Tharsis
"Reges Tharsis et insulae" is a common Latin motet and antiphon title. It is the beginning of the Latin Vulgate translation of Psalm 71:10. The wording was used in European cathedrals as a responsory for The Feast of Epiphany, "The Day of the Three Kings," and with slightly altered text as an antiphon for Epiphany.
The oldest surviving musical setting of the text is as Gregorian chant. A very large number of composers set the text over the centuries: Renaissance composers such as Palestrina, and Byrd, classical composers such as Joseph Leopold Eybler, up to modern composers such as John Scott Whiteley, Gaston Litaize, and Perosi. The most frequently performed, and recorded, setting today is that by John Sheppard.