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Isaac I Komnenos
Isaac I Komnenos was the Byzantine emperor from 1057 to 1059 CE. Although his reign was brief, he was known for being a capable and militarily astute general and emperor. As the first emperor to lead troops himself in battle in over 30 years...
Definition
Isaac Newton
Isaac Newton (1642-1727) was an English mathematician and physicist widely regarded as the single most important figure in the Scientific Revolution for his three laws of motion and universal law of gravity. Newton's laws became a fundamental...
Definition
Constantine X Doukas
Constantine X Doukas was the ruler of the Byzantine Empire from 1059 to 1067 CE. During his reign, the Byzantine Empire was attacked by emerging enemies on all sides, including the Normans in Italy and the Seljuk Turks in Armenia and Anatolia...
Article
Clocks in the Scientific Revolution
Keeping good time proved an elusive objective for centuries, and it was only in the second half of the 17th century, during the Scientific Revolution (1500-1700), that clocks were made which lost seconds rather than minutes each day. The...
Definition
Abraham, the Patriarch
In Judaism, Christianity, and Islam, Abraham is a venerated patriarch whose relationship with God provides the foundational story for God's beneficial relationship with humanity. According to biblical tradition (and some say myth), Abraham...
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Sacrifice of Isaac by Brunelleschi
The bronze panel showing Abraham's sacrifice of Isaac by the Italian Renaissance artist and architect Filippo Brunelleschi (1377-1446 CE). The panel was created in 1401 CE as a trial piece for the competition to see who would receive the...
Image
The Angels before Abraham & Sacrifice of Isaac by Ghiberti
A panel from the east doors of Florence’s Baptistery of San Giovanni. Made from 1425 CE by Lorenzo Ghiberti (1378-1455 CE). Gilded bronze. This panel shows the angels appearing before Abraham and the sacrifice of Isaac. The artist Michelangelo...
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Byzantine Histamenon of Isaac I
Gold histamenon coin of Byzantine emperor Isaac I Komnenos (r. 1057-1059 CE), who is pictured on the reverse (on the right), crowned and in military dress, while the obverse shows Christ enthroned. (Classical Numismatic Group, Inc. http://www.cngcoins.com...
Definition
Jacob
Jacob is one of the patriarchs of ancient Judaism and the father of who became the twelve tribes of Israel. His story is told in Genesis 25-50. His Hebrew name is derived from Ya-aqob ("to supplant" or "circumvent") and is constructed from...
Definition
Manuel I Komnenos
Manuel I Komnenos was emperor of the Byzantine Empire from 1143 to 1180 CE. Manuel continued the ambitious campaigns of his grandfather Alexios I and father John II to aggressively expand the boundaries of his empire. Manuel turned out to...