When Ireland was still a land of the Druids, St. Patrick came to teach of the one God. Legend suggests that St. Patrick used a Celtic shamrock to demonstrate the meaning of the Christian trinity (Fauther, Son and Holy Ghost). Although one myth states that St. Patrich  inspired this (in a Christian view), earlier ledgends suggest that the trinity has long been part of the Irish culture. The Celtic shamrocks are renowned for having mystical power and meaning. It's petals will stand upright to warn of an approaching storm. Even today the shamrock is Irelands most fameous symbol. The Celtic shamrock is the unofficial symbol for Ireland.

To the druids, the Celtic shamrock was, and is, a sacred plant because its leaves form a triad. Three is a mystical number in the Celtic religion. In ancient days of the Christian inquisition anyone wearing a shamrock was hanged. It was also a sign of rebellion by the Irish to the English in those days.

The Celtic shamrock design is also a sign of an English speaking, warm establishment around the world in Irish pubs.

The beautiful Celtic Shamrock is a plant with three leaves. A symbol that is based on the clover. It's name comes from the Irish “seamrog”, a shorter version of seamar clover. The plant was revered by the early Druids as sacred. It grows with such vitality that it came represent life itself. In medieval love poetry this theme continued with stories of young couples who would meet or make love in clover.

A phrase "in clover" that origionated from the shamrock came from livestock grazing off of Celtic clover.

Although the interesting heritage of the shamrock undoubtedly contributes to a beautiful symbolic meaning, Clover was often planted on graves to symbolize the hope of new life, thus by association, also symbolizes a sense of parting. Today, the shamrock is not just a symbol, it is the unofficial the symbol of Ireland itself.

In Celtic tattoo, a Shamrock image is often paired with other symbols of Ireland, including harps, a leprechauns, or even the early name of Ireland itself “Erin”. Great quantities of shamrocks are shipped from the Emerald Isle to other countries every year. It done in celebration of St. Patrick’s Day, a patron saint. Not just with that, but also with its long heritage as an important symbol of the sacred heritage of the Irish.