<prompt> Translate the following text to SwahiliThe cultural, political, and religious center of early Celtic civilization, seat of the High Kings, its importance waned after the arrival of Christianity.  <response>: Jiji hilo lilikuwa kitovu cha kitamaduni, kisiasa, na kidini cha ustaarabu wa mapema wa Waselti, na lilikuwa makao ya Wafalme Wakuu. 