belvedere a summer house or open-sided gallery, typically at rooftop level, commanding a fine view; the word comes (in the late 16th century) from Italian, literally ‘fair sight’. (See also the Apollo Belvedere at Apollo.)
Belvedere Torso a Greek sculpture fragment of a male nude, believed to have been copied by the Athenian sculptor Apollonius from a 2nd-century original; the pose of the torso influenced Michelangelo and was much studied in the Late Renaissance and Baroque periods.

belvedere. Any raised structure or tower erected over the roof of a dwelling-house or on a vantage-point in a landscape from which pleasant scenery may be viewed. Such a building in a garden might be in the form of a Classical temple, and is also termed a gazebo, mirador, or summer-house.

bel·ve·dere / ˈbelviˌdi(ə)r/ • n. a summerhouse or open-sided gallery, usually at rooftop level, commanding a fine view.

belvedere turret on a building commanding a view. XVI. (partly through F. belvédère) — It. belvedere lit. ‘fair sight’, f. bel, bello beautiful + vedere sight.