• century ⪢⪢
http://qindex.info/i.php?x=17844

• century ⪢⪢
http://qindex.info/i.php?x=17895

• Thomas Piketty's Capital in the 21st Century
http://qindex.info/i.php?x=4776

• 0750± positional notation
By the 8th century, Indian mathematicians had perfected positional notation and over the next several centuries, Arab merchants, scholars and conquerors began to spread it into Europe. -- vigesimal, Maghreb, Hebrew, glyph, Aztecs, duodecimal, sexigesimal
http://qindex.info/i.php?x=4984

◌◌◌ Iraq
A Brief History of U.S. Intervention in Iraq Over the Past Half Century
http://qindex.info/i.php?x=1704

○○○ James Clerk Maxwell ⪢⪢
Figures like Newton and Huygens worked with light in the 17th century but a more sophisticated description of light which we call classical electromagnetism was developed largely by James Clerk Maxwell in the 19th century.  
http://qindex.info/i.php?x=7097

○○○ Madaba ⪢⪢
In the late 19th century, construction began on a new Greek orthodox church in Jordan's capital city of Madaba. #image #place
http://qindex.info/i.php?x=17336

○○○ 0850 ± ⪢⪢
During the 9th century, Scandinavia in northern Europe is populated by, among others, the Vikings, excellent sailors who explore in all directions to plunder but also to develope trade routes.
http://qindex.info/i.php?x=5285

○○○ rural ⪢⪢
Now hanging up in the Art Institute of Chicago, American Gothic is one the most famous paintings of 20th century rural Americana. #art
http://qindex.info/i.php?x=23861

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