Irish symbols that represent a message of love, loyalty, strength, and religious beliefs. There are Celtic symbols and Irish symbols, and the two are different. Celtic symbols typically have three intertwined elements. These pieces represent the belief that everything of importance has three components: the earth, sky, and sea. Traditional symbols of Ireland and Celtic include: + A harp (Ireland's official national emblem). + Claddaugh + Celtic Cross + A shamrock (the national flower of Ireland). + The trinity knot