Matthaus Merian began publishing the 'Theatrum Europaeum' in 1633, it was not finished until 1738 by which time 21 volumes had been issued including some 20,000 pages of text, 720 maps, plans, views and other engravings and nearly 700 portraits. A birds-eye view of the old Canton of Unterwalden in central Switzerland south of Lake Lucerne. It now consists of two Cantons; Obwalden and Nidwalden.