organum purum

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King Cobra snake in Malaysia. (reptile)

9 of the World’s Deadliest Snakes

Lusitania sinking, illustration from The War of the Nations (New York), December 31, 1919. World War I, WWI. This image is one of three on the page. (See source file for the other two.)

7 of the World’s Deadliest Shipwrecks

New Zealand. Political/Physical map. Includes locator.

Where Is “Old Zealand”?

Groups of depositors in front of the closed American Union Bank, New York City. April 26, 1932. Great Depression run on bank crowd

Causes of the Great Depression

Easter Procession of Maria Santisima del Sacromonte in Granada, Spain. This statue is known as Virgen de los Gitanos or The Virgin of the Gypsies.

What is Holy Week?

Illustration for Demystified "How Dangerous is Quicksand"

How Deadly Is Quicksand?

Hemp (Cannabis sativa).

9 Mind-Altering Plants

organum purum

music

Learn about this topic in these articles:

development of polyphony

In Western music: Development of polyphony
This new style was called organum purum.
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