Alsace is a region that continues to fascinate scholars and visitors. In the series "The Castles of Alsace", Thomas Biller and Bernhard Metz focus on the beginnings and background to the construction of noble castles in one of the most evocative castle landscapes in Europe. The emergence of the classic castle type with its architecturally striking forms in mortar and ashlar masonry is revealed as a phenomenon that began to shape the region abruptly in the mid-12th century.