Offa's Dyke, most of which was probably built in his reign, is a testimony to the extensive resources Offa had at his command and his ability to organise them.
Dike Offa sebagian besar yang mungkin dibangun di masa pemerintahan Offa, adalah kesaksian pada sumber daya yang luas yang telah di perintah Offa dan kemampuannya untuk mengatur mereka.