Sun clock at the Engelgardt Astronomical Observatory at Oktyabrsky village of Zelenodolsky District of Tatarstan.
- Categories: Science & Technology, Arts, Culture & Entertainment
- Location: Republic of Tatarstan, Russia
- Event date: 21.08.2017
- Date published: 21.08.2017
- Author: Maksim Bogodvid
- Credit: Sputnik
- Source: Sputnik
- Original: Digital
- Media: JPEG, 3712x5568px, 9Mb