The original tune for "Hark! I hear the harps eternal" was composed by George Frederick Handel in 1736. The tune is known as "Hallelujah Chorus" and was initially part of Handel's oratorio "Messiah."
Over time, various composers have created different arrangements and versions of the hymn. One notable arrangement was made by William Billings. In 1804, Billings published a four-part harmonization of the hymn, which became popular in American singing schools and churches.
Today, "Hark! I hear the harps eternal" remains a beloved hymn in many Christian denominations. It is often sung during Easter services, funerals, and other occasions when the theme of eternal life is celebrated.