Sundial: Did you mean...?

A 1st century CE sundial decorated with the likenesses of Helios, Dionysus, and Athena. Sundials were set up both in the public and in the private sphere in ancient Greece. The reconstructed indicator (gnomon) of the conical...

A Roman period sundial of the Greek hemispherical type. (Archaeological Museum of Piraeus)

Cheomseongdae (Chomsongdae) is a 7th-century CE observatory tower located in Gyeongju, the capital of the Silla Kingdom of ancient Korea. It is the oldest surviving astronomical observatory in East Asia and is listed as no. 31 on...

Mesopotamian science and technology developed during the Uruk period (circa 4000-3100 BCE) and the Early Dynastic period (circa 2900-2350/2334 BCE) of the Sumerian culture of...

The astrolabe is an astronomical instrument used from around the 6th century to measure time and position by determining the altitude of heavenly bodies like the Sun and certain stars. Measurements were taken in reference to the viewer's...

Korea, located on a large peninsula on the eastern coast of the Asian mainland, has been inhabited since Neolithic times. The first recognisable political state was Gojoseon in the second half of the first millennium BCE. From the...

Machu Picchu is an Inca settlement located in the High Andes of Peru in the Urubamba Valley, north of Cuzco. The site, perched high above the Urubamba river, has been variously described as a fortress, imperial retreat and ceremonial...

The Three Kingdoms Period of ancient Korea (57 BCE – 668 CE) is so-called because it was dominated by the three kingdoms of Baekje (Paekche), Goguryeo (Koguryo), and Silla. There was also, though, a fourth entity...

The architecture of ancient Korea is epitomised by the artful combination of wood and stone to create elegant and spacious multi-roomed structures characterised by clay tile roofing, enclosures within protective walls...

King Sejong the Great (15 May 1397 to 8 April 1450 CE) ruled Korea from 1418 to 1450 CE as the fourth king of the Joseon Dynasty (also spelled Choson). One of only two Korean kings called 'the Great' today, Sejong had a major...