With its rich history and intricate symbolism, the Celtic knot is commonly associated with Irish and Scottish heritage, although its roots extend far beyond these two cultures. Originating during the late Roman Empire, Celtic knots first made their appearance in the British Isles around the 7th century, during the early Christian era.

Historians have suggested that Celtic knots originated in Northern Italy and the southern part of Gaul (Gallia), before spreading to Ireland, Wales, and Scotland. Knotwork designs in the Celtic style can also be seen in Roman and, later, early Christian art, such as mosaics, monuments, tapestries, and illuminated manuscripts.

Celtic knotwork originated from the Celtic civilization and is closely associated with their culture and spiritual practices, such that it has become a crucial part of Irish and English history. The Celts inhabited multiple parts of Europe and their art reflected a mix of influences and styles.