9 Ancient Obelisk Sundials Explored

9. Islamic Sundial at Qutb Complex

8. Mesoamerican Sundials

7. Medieval European Sundials

6. Islamic Sundials

5. Chinese Sundials

4. Roman Sundials

3. Greek Sundials

2. Egyptian Sundials

1. Hellenistic Sundials

8 Archaic Tower Clocks Rediscovered