During the palatial period , the ring walls and the most important public buildings within the main fortress were built .
During the palatial period , the ring walls and the main public buildings were built within the main fortress .
During the palatial period , the ring walls and the main public buildings were built within the main fortress .
Write a paraphrased version of the sentence: During the palatial period , the ring walls and the most important public buildings within the main fortress were built . Output: