In some instances the medieval kings did not disturb the mound of ruins at all .
In some instances the medieval kings did not erected an inferior brick structuxe on the top of it , the scattered old stones being commonly used for steps leading up to the mound .
In some instances the medieval kings did not disturb the mound of ruins at all but erected an inferior brick structuxe on the top of it , the scattered old stones being commonly used for steps leading up to the mound .