Celtic Jewelry design. The Triquetra, or Celtic Trinity Knot, is a three cornered Celtic knot design with various meanings. Christians will see it as representing the Trinity of the Father, Son, and Holy Ghost or Spirit. An intricate and highly detailed trinity knot as a symbol for faith and heritage set into the center of and interlaced Celtic circle design. Wear it for St. Patrick's day or all year long 8.5 oz, Classic fit, Twill-taped neck