Castles, commerce, and control: William fitzOsbern and the management of maritime space, 1067–71

This study reorients the analysis of the Norman Conquest by emphasizing the critical role of waterways in shaping political, military, and economic strategies, thereby challenging traditional land-centric perspectives of the first years of Norman rule in England. Employing a multidisciplinary methodology that integrates archaeology, landscape analysis, charters, and chronicles, the research investigates William fitzOsbern’s activities in the southern Welsh March and Severn Estuary. This approach reveals that maritime space was actively managed for security and commercial purposes, with castles and towns strategically positioned along waterways to facilitate trade and control maritime navigation. The article argues that the maritime connectivity of this region was essential for both defence against seaborne threats and for economic development. These insights underscore the importance of waterways in Norman lordship and demonstrate that maritime considerations significantly influenced early Norman policies. The findings contribute to a broader understanding of landscape and mobility in the first years of Norman rule, highlighting waterways as vital to regional stability and economic growth.