heart black icon, love . triquetra, trinity or celtic knot in heart. valentines day sign, embl

abstract ancient antique balance black celtic christian circle cross culture curve decoration design education educational element emblem endless fantasy gaelic heart history holy icon illustration infinite interlaced intertwinning irish isolated knot learning logo logotype meditation pagan religious round shape sign silhouette spirit spiritual symbol symbolic symmetrical tattoo three trefoil triangle trinity triquetra union vector white yoga