<prompt> Translate the following text to EnglishKatika maeneo mengi yaliyojitenga, wakati huohuo, ngome za mwisho za ulinzi katika umbo la minara ya mawe ya mviringo zilijengwa, na baadhi ya minara hiyo bado ina watu leo.  <response>: In many isolated regions, meanwhile, last-ditch defences in the form of round stone towers were built, a few of which are still inhabited today. 