The difference in the duration of day and night increases as one moves from

Norway is called as the land of midnight sun.

Hagia Sophia is the former Greek Orthodox Christian patriarchal cathedral, later an Ottoman imperial mosque and now a museum in Istanbul, Turkey.

It was built in 537 AD at the beginning of the Middle Ages, it was famous in particular for its massive dome. It was the world's largest building and an engineering marvel of its time.

The dome of the Hagia Sophia is supported by the four pendentives of the square corners.

River Congo is the only river which crosses the equator twice.

The Magna Carta has long been cited as the original source for such documents as the United States Constitution. It was a document that presented ideas that were progressive beyond its time, one that still bears relevance today.

The Magna Carta primarily established the rights of 13th-century English citizens. It granted protection from unlawful imprisonment and swift justice, which established the idea that everybody, including the king, was subject to the letter of the law.