Wiigwaasabak (in Anishinaabe syllabics: ᐧᐆᒃᐧᐋᓴᐸᒃ, plural: wiigwaasabakoon ᐧᐆᒃᐧᐋᓴᐸᑰᓐ) are birch bark scrolls, on which the Ojibwa (Anishinaabe) people of North America wrote complex geometrical patterns and shapes, also known as a "written language." When used specifically for Midewiwin ceremonial use, these scrolls are called mide-wiigwaas (in syllabics: ᒥᑌᐧᐆᒃᐧᐋᔅ). These enabled the memorization of complex ideas, and passing along history and stories to succeeding generations. Several such scrolls are in museums, including one on display at the Smithsonian Museum in Washington, DC. In addition to birchbark, copper, and slate may have also been used, along with hides, pottery, and other artifacts. Some archaeologists are presently trying to determine the exact origins, dates, and locations