1. Meaningful constructions – spatial and functional analysis of medieval buildings
2. Though two of the castles (Beaumaris and Caernarfon) were never finished, many structural dues survive that allow researchers to reconstruct their intended complete plan. For an explanation of each ‘completed’ element in the intended plans of Beaumaris and Caernarfon see J. R. Mathieu, ‘The use of space in four Edwardian castles’, unpublished M.A. dissertation, University of York (1994).