What do you call the little boxes or “steeples” on top of houses that sometimes have like a weather vain?
You usually see them atop guest houses or detached garages.
It is called a cupola.
More info here:
http://www.google.com/search?q=coupl&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a#sclient=psy&hl=en&client=firefox-a&hs=Zyw&rls=org.mozilla:en-US%3Aofficial&source=hp&q=roof+cupola&aq=2ms&aqi=g-s1g-sv1g-ms1g-bs2&aql=&oq=&pbx=1&bav=on.2,or.r_gc.r_pw.&fp=16cccdb0d536ba00&biw=1280&bih=885
HP Pavilion dv6135 Remove / Replace LCD LED Screen