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The greater petrosal nerve, also known as the greater superficial petrosal nerve, is a branch of the nervus intermedius (nerve of Wrisberg) that carries parasympathetic, taste, and general sensory fibers from the facial nerve (10th cranial nerve or cranial nerve VII). This nerve arises from the superior salivatory nucleus in the brainstem, passes through the geniculate ganglion without synapsing, and exits through the facial hiatus of the petrous bone. The greater petrosal nerve fuses with the deep petrosal nerve to form the Vidian nerve, which courses toward the pterygopalatine ganglion. The parasympathetic branches of the greater petrosal nerve stimulate the lacrimal, nasopharyngeal, and palatine mucosal glands.[1] Lesions along the greater petrosal nerve may cause xerophthalmia, facial palsy, hearing loss, and altered taste sensations. This nerve is also a vital landmark for middle cranial fossa procedures. Understanding the anatomy and function of the greater petrosal nerve is essential in managing various head and neck disorders.