Oh yes,these trulli houses are inhabited;Alberobello it is not a museum.Please,read my short description from Wikipedia Lexikonhttp://www.pbase.com/bauer/trulli .These are often very loved homes of tourists and also of locals ...."Today the surviving trulli are popular among English and German tourists and are often bought and restored for general use. However,anyone wishing to restore a trullo needs to conform with many regulations as trulli are protected under the United Nations Educational, Scientific and Cultural Organization (UNESCO) world heritage law..."