The cranial Dura mater is the part of the hard meninx (Dura mater), covering the brain within the skull. It belongs to the meninges.
The cranial Dura mater forms the continuation of the spinal Dura mater above the Foramen magnum. It consists of two layers resp. leaves that are grown together, so that there is no physiologic epidural space, in contrast to the spinal canal.
Between the two layers, there are the meningeal blood vessels (e.g. medial meningeal artery), and the cerebral sinuses.