Rosemary essential oil is derived from the aromatic herb rosemary (Rosmarinus officinalis), a plant native to the Mediterranean region that has been valued since ancient times for its medicinal, culinary, and spiritual significance. Its use dates back to early civilizations such as the Egyptians, Greeks, and Romans, who regarded rosemary as a symbol of remembrance, protection, and purification. Ancient Egyptians used rosemary in burial rituals and incense, while Greek scholars are believed to have worn rosemary garlands to enhance memory and concentration.

During the Roman era, rosemary was widely used in religious ceremonies, cooking, and natural healing practices. In the Middle Ages, it became a staple in European herbal medicine, often used to ward off illness and purify the air during times of plague. Rosemary was also infused into balms and oils for treating muscle pain, improving circulation, and promoting hair growth.