Heresy: Did you mean...?

Jan Hus (also John Huss, l. c. 1369-1415) was a Czech philosopher, priest, and theologian who, inspired by the work of John Wycliffe (l. 1330-1384) challenged the policies and practices of the medieval Church and so launched the Bohemian...

William Tyndale (l.c. 1494-1536) was a talented English linguist, scholar and priest who was the first to translate the Bible into English. Tyndale objected to the Catholic Church’s control of scripture in Latin and the prohibition against...

Galileo Galilei (1564-1642) was an Italian mathematician, physicist, astronomer, and natural philosopher. He created a superior telescope with which he made new observations of the night sky, notably that the surface of the Moon has mountains...

The Counter-Reformation (also known as the Catholic Reformation, 1545 to c. 1700) was the Catholic Church's response to the Protestant Reformation (1517-1648). It is usually dated from the Council of Trent in 1545 to the end of the Great...

Western astrology refers to a form of divination based on the motion of astronomical objects such as stars or planets. The belief that astronomical objects are divine or influence events on Earth is found in many cultures, but the practices...

The Council of Chalcedon was called in 451 CE by the Roman Emperor Marcian (r. 450-457) to settle debates regarding the nature (hypostases, "reality") of Christ that had begun at two earlier meetings in Ephesus (431 CE and 439 CE). The question...

The Diet of Worms (January-May 1521) was the assembly convened by Charles V, Holy Roman Emperor to address, among other issues, the works of the reformer Martin Luther (l. 1483-1546) who openly criticized the Church. Luther was told to recant...

Odoacer (433-493 CE, reigned 476-493 CE) also known as Odovacar, Flavius Odoacer, and Flavius Odovacer, was the first king of Italy. His reign marked the end of the Roman Empire; he deposed the last emperor, Romulus Augustulus, on 4 September...

Margery Kempe (l. c. 1373 - c. 1438 CE) was a medieval mystic and author of the first autobiography in English, The Book of Margery Kempe, which relates her spiritual journey from wife and mother in Bishop's Lynn, England to a chaste Christian...

Constantine I (Flavius Valerius Constantinus) was Roman emperor from 306-337 CE and is known to history as Constantine the Great for his conversion to Christianity in 312 CE and his subsequent Christianization of the Roman Empire. His conversion...