What other symbols represent Ireland?
The Shamrock, which has three leaves. Saint Patrick used it to demonstrate the Trinity.
The four-leaf clover is NOT an Irish symbol.
Saint Brigid's Cross
As the Shamrock is associated with St. Patrick, the small cross made of rushes is linked forever to St. Brigid of Ireland. Brigid died in 524 and among the many things and great charity for which she is known, it was while explaining the Passion to a dying pagan that she wove her famous cross. It is believed that the St. Brigid cross protects homes from evil and want.
And of course, most important of all, the Harp:The Harp is exclusively an emblem of the State at home and abroad. It is always used by Government Departments and Offices. It also appears on all Irish coins.