Maeshowe (or Maes Howe; Norse: Orkhaugr) is a Neolithic chambered cairn and passage grave situated on Mainland, Orkney, Scotland. It was probably built around 2800 BCE. It gives its name to the Maeshowe type of chambered cairn, which is limited to Orkney. Maeshowe is a significant example of Neolithic craftsmanship and is, in the words of the archaeologist Stuart Piggott, "a superlative monument that by its originality of execution is lifted out of its class into a unique position." The monuments around Maeshowe, including Skara Brae, were designated a UNESCO World Heritage Site in 1999.