Silver Rhodium Celtic Trinity Knot Irish Bridal Tiara. ( Irish Wedding Crown) Irish Tiara: The front is focused on a single Trinity Knot (representing the Holy Trinity) which is filled with Austrian crystals. Additional accents include smaller Trinity Knots, Celtic Knotwork and pearls. Frontal design measures approximately 4 1/2" in length and 1" high. Made in Ireland by Tara.