It was written in 1913 by James Royce Shannon (born James Royce) for the Tin Pan Alley musical production “Shameen Dhu.” The song gained tremendous popularity when it was performed by Bing Crosby in the 1944 film “Going My Way,” for which Crosby won an Academy Award. Crosby’s rendition cemented the song in American cultural consciousness as a quintessentially “Irish” melody, despite its American origins. The lullaby’s gentle, soothing melody and simple lyrics made it a favorite bedtime song for generations of children. Over the decades, it has been recorded by numerous artists including Judy Garland, Connie Francis, and Van Morrison, and continues to evoke nostalgic sentiments of Irish heritage in the American diaspora, particularly around St. Patrick’s Day celebrations.