Sundial on a roof
(Edition - unique)
This sundial is installed on the roof of an old Moscow building. It is easy to prove that here, at the height of 65 m above the ground level it is closer to the sun exactly by 65 m. Here, in a small green oasis, you may have a bird's-eye view on the city, track a course of the sun, and think of irreversibility of the time.

