Don’t forget to set your clocks back as Daylight Saving Time is ending. We are switching back to regular time.
The sundial in the picture above is an Angbuilgu from the Joseon era in Korea. The word “Angbuilgu” means “upward-looking kettle that catches the shadow of the sun.”
This type of sundial was developed in 1434. It is very sophisticated and can not only show time of day, but also the time of year.
This sundial is in the Topkapi Sarayi Museum. You can read more about the museum in my post: Historic Istanbul
The sundial is from about the same era as the one in Korea. The sundial was made during the reign of Sultan Mehmed II (1451-1481).
Here is the surface of the sundial. This is also a very complex sundial as it has two gnomons and three dials. The gnomon is what casts the shadow onto the dial. If you look closely you can see that the small spike in the middle throws a shadow. The other gnomon is the wire that stretches to the top of the ornate spindle.
I am thinking of what clocks that I need to change tomorrow. Most of mine change automatically. I only have to change a few of them.
Enjoy that extra hour of sleep.