Under the succeeding Kassite dynasty , shortly after the middle of the 2nd millennium , Ekur was restored once more to its former splendor , several monarchs of that dynasty built upon and adorned it , and thousands of inscriptions , dating from the time of those rulers , have been discovered in its archives .
Under the succeeding Kassite dynasty , shortly after the middle of the 2nd millennium , Nippur was restored once more to its former splendor .