<prompt> Translate the following text to EnglishMichoro bora zaidi iko katika majumba ya maonyesho, ambayo hufikishwa kwa njia ya mteremko ulio upande wa kaskazini wa chumba cha kuhifadhia.  <response>: The best mosaics are in the galleries, reached by a spiral ramp at the north end of the narthex. 