This site is an addition to an existing Library of Congress (LOC) American Memory Project (last reviewed in the April 30, 1999 Scout Report) collection. The new resource, Abraham Ortelius's Theatrum Orbis Terrarum (Theater of the World), was published in 1570 and "considered the first true atlas in the modern sense." Located in the special atlases presentation section on the General Map Collections page, the online Terrarum consists of 181 image pages. Users can view the atlas page-by-page or choose to view the maps only. A brief essay is also included.