<prompt> Translate the following text to SwahiliSardis was once the wealthiest city in the world, under the famous King Croesus reigned 560 546 b.c. , hence the expression rich as Croesus.  <response>: Sardisi ilikuwa mji tajiri zaidi duniani wakati wa utawala wa mfalme Croesus 560 KK - 546 KK, na kwa hiyo jina la mtajiri lilitumiwa. 