Duluth, Minnesota four Catholic schools with coverage up to grades 6 or 8, two Protestant schools, two Montessori schools, and six other charter and private schools. Due to its proximity to the Great Lakes, Duluth is the location for the Large Lakes Observatory. The Large Lakes Observatory operates the largest university-owned research vessel in the Great Lakes, the R/V Blue Heron. Built in 1985 for fishing on the Grand Banks, the Blue Heron was purchased by the University of Minnesota in 1997, sailed from Portland, Maine, up the St. Lawrence Seaway to Duluth, and converted into a limnological research vessel during the
Duluth, Minnesota by natives with the United States in the present neighborhood of Fond du Lac in 1826 and 1847, by which the Ojibwe ceded land to the American government. As part of the Treaty of Washington (1854) with the Lake Superior Band of Chippewa, the United States set aside the Fond du Lac Indian Reservation upstream from Duluth near Cloquet, Minnesota. The Ojibwe population was moved there. As European Americans continued to settle and encroach on Ojibwe lands, the U.S. government made a series of treaties, executed between 1837 and 1889, that expropriated vast areas of tribal lands for their use