During the heyday of the taifas , in the 11th century and again in the mid 12th century , their emirs -LRB- rulers -RRB- competed among themselves , not only militarily but also for cultural prestige .

In the 11th century and again in the mid 12th century , the emirs -LRB- rulers -RRB- of thr taifas competed very much among themselves , not only militarily but also for cultural prestige .
