Gesù Bambino is an Italian Christmas carol composed by organist Pietro Alessandro Yon in 1917. Written during the First World War while Yon was working in New York, the piece became widely performed by choirs and soloists during Advent and Christmas, and its melody is also known in English through Frederick Martens' version. Recordings have kept it in circulation for more than a century, and short excerpts now travel online as seasonal audio for greetings, edits and social posts each December.