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about
1267
| 1267 • Roger Bacon completes his work Opus Majus and sends it to Pope Clement IV, who had requested it be written; the work contains wide-ranging discussion of mathematics, optics, alchemy, astronomy, astrology, and other topics, and includes what some believe to be the first description of a magnifying glass. Bacon also completes Opus Minus, a summary of Opus Majus, later in the same year. The only source for his date of birth is his statement in the Opus Tertium, written in 1267, that "forty years have passed since I first learned the alphabet". The 1214 birth date assumes he was not being literal, and meant 40 years had passed since he matriculated at Oxford at the age of 13. If he had been literal, his birth date was more likely to have been around 1220. |
1310
Age: 43y
marriageMahienne De Lannoy |
| 1310 • Basarab I, after the battle against the Tatars, is named "big prince" of Wallachia by the feudal lords of the region. The country remains under Hungarian domination until the Battle of Posada on 12 October, 1330. |
after
Age: 44y
1311
Age: 44y
birth of childHugues De Lannoy I Lys, France ⇓ The Genealogy and History of the Delano Family p.30 2 Sources ⇓ |
| 1311 • A committee of 21 English barons draw up a series of ordinances, which substitute ordainers for the King (Edward II) as the effective government of the country. |
1314
Age: 47y
| 1314 • Philip IV of France is succeeded by Louis X. |