<prompt> Translate the following text to EnglishMilango yake mikubwa ya shaba inaonyesha historia ya kisiwa hicho, na jumba kubwa la maonyesho la ndani lina almasi kwenye sakafu chini ya bonde, ikionyesha enzi hiyo ya mbali wakati Cuba ilikuwa tajiri.  <response>: Its vast bronze doors pictorially chart the islands history, and the immense main gallery inside has a diamond in the floor beneath the dome, symbolizing that now-distant era when Cuba was rich. 