 The prototype for the spa at Brückenau was the "maison de plaisance" of Château de Marly, which was built from 1679 to 1687 by Louis XIV.The most important spa towns of the 18th century are not the relatively small princely baths, but Bath in England and Aachen in Germany.Both towns played a decisive part in the development of spa architecture in the 19th and early 20th centuries.