<prompt> Translate the following text to EnglishMji wa Pergamo ulikuwa mojawapo ya majiji yenye ufanisi zaidi kwenye pwani ya Aegea, na uliongozwa na nasaba ya Attalid tangu 264 K.K.  <response>: One of the most prosperous city-states of the Aegean coast was Pergamum, ruled since 264 b.c. by the Attalid dynasty. 