(At right) View from the Asakusa Astronomical Observatory, used by the Tenmongata of the Edo shogunate for astronomical observation; at center is a "Kontengi" (armillary sphere); woodblock print by Katsushika Hokusai in "Fugaku-hyakkei" (1834/5) @NDLJP_en https://t.co/Ctw5MYrwLR https://t.co/QU1KoHq5hs