<prompt> Translate the following text to SwahiliIn the 17th century this fort was all there was to the town, but dwellings were gradually built up around it on reclaimed marshland.  <response>: Katika karne ya 17, ngome hii ilikuwa ni mji wote, lakini nyumba zilijengwa hatua kwa hatua kuzunguka juu ya marshland iliyopatikana. 