Caption:
The Rhine and the Danube formed most of the northern inland frontier of the Roman Empire and, since those days, the Rhine has been a vital and navigable waterway carrying trade and goods deep inland. Its importance as a waterway in the Holy Roman Empire is supported by the many castles and fortifications built along it. It is the second-longest river in Central and Western Europe (after the Danube), at about 760 miles. Joan Blaeu (1596-1673) was a Dutch cartographer, the son of cartographer Willem Blaeu. In 1635 they published the Atlas Novus (full title: Theatrum orbis terrarum, sive, Atlas novus) in two volumes. The Atlas Maior is the final version of Joan Blaeu's atlas, published in Amsterdam between 1662 and 1672, in Latin, French, Dutch, German and Spanish, containing 594 maps and around 3,000 pages of text.