Complex sentence: He built many castles including Montgomery, Shrewsbury, Ludlow, Clun, Hopton and Oswestry; over 90% of the lordships and manors of Shropshire were held in Chief at the Domesday by him.
Split into simpler sentences: He built many castles including Montgomery, Shrewsbury, Ludlow, Clun, Hopton and Oswestry. Over 90% of the lordships and manors of Shropshire were held in Chief at the Domesday by him.