Penson was an early and leading exponent of Romanesque Revival architecture and he developed a distinctive style based on the French Romanesque and the earlier Romanesque of the German and Flemish Brick Gothic. Penson built at least six churches in this style. Romanesque Revival architecture had been introduced in Wales by Thomas Hopper’s ‘‘Neo-Norman’’ or ‘’Norman revival’’ designs for Penrhyn Castle, which were executed between 1822-37., The style of Romanesque adopted by Penson contrasts with the Italianate Romanesque of other architects such as Thomas Henry Wyatt, who designed Saint Mary and Saint Nicholas Church, Wilton in this style at Wilton which was built between 1841 and 1844 for the Dowager Countess of Pembroke and her son, Lord Herbert of Lea.