INTERWOVEN CIRCLES (also the TRIQUETRA)  The triangle is one of the oldest symbols of the Blessed Trinity.  The continuous form of this symbol – three interwoven arcs is produced by an unbroken line.  If you’re Irish, you will most certainly have this symbol in your heritage.  Celtic crosses most likely will bear a representation of this symbol.  Many drawings of cradles found in the Christian Nativity will have this symbol on the headboard.