A Passage Grave is a type of ancient burial structure characterized by a long passage leading to a central chamber. These graves are typically made of large stones and are often covered by a mound of earth. They are found in various parts of Europe, particularly in regions like Ireland and Scotland, and date back to the Neolithic period. The design of a passage grave allows for the burial of multiple individuals and often includes intricate carvings or markings on the stones. These structures are believed to have held significant cultural and spiritual importance for the communities that built them, serving as places for rituals and commemorations of the dead.