Editing 1267 (section)

=== Culture ===
* [[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 [[University of Oxford|Oxford]] at the age of 13. If he had been literal, his birth date was more likely to have been around [[1220]].<ref>{{Cite book|url=https://books.google.com/books?id=zPcxBgAAQBAJ&q=1267+Roger+Bacon+Opus+Majus&pg=PA14|title=The Great Controversy: The Individual's Struggle Between Good and Evil in the Testaments of the Twelve Patriarchs and in Their Jewish and Christian Contexts|last=Bruin|first=Tom de|publisher=Vandenhoeck & Ruprecht|year=2014|isbn=9783525540350|location=Göttingen, Germany|pages=14|language=en}}</ref><ref>{{Cite book|url=https://books.google.com/books?id=SrgsDAAAQBAJ&q=1267+forty+years+have+passed+since+I+first+learned+the+alphabet&pg=PA80|title=Are Numbers Real?: The Uncanny Relationship of Mathematics and the Physical World|last=Clegg|first=Brian|publisher=St. Martin's Press|year=2016|isbn=9781466892965|location=New York|pages=80|language=en}}</ref>
* The leadership of [[Vienna]] forces [[Jew]]s to wear the ''Pileum cornutum'', a cone-shaped head dress, in addition to the [[yellow badge]]s Jews are already forced to wear.<ref>{{Cite book|url=https://books.google.com/books?id=jTL-AQAAQBAJ&q=1267+Vienna+Pileum+cornutum&pg=PA108|title=The Witch Figure: Folklore Essays by a Group of Scholars in England Honouring the 75th Birthday of Katharine M. Briggs|last=Newall|first=Venetia|publisher=Routledge|year=2013|isbn=9781136551734|series=Anthropology and Ethnography|location=London and New York|pages=108|language=en}}</ref>
* [[November 18]] &ndash; In England, the [[Statute of Marlborough]] is passed, the oldest English law still (partially) in force.<ref>{{Cite book|url=https://books.google.com/books?id=NKxREhu762AC&q=1267+Statute+of+Marlborough|title=Kings, Barons and Justices: The Making and Enforcement of Legislation in Thirteenth-Century England|last=Brand|first=Paul|publisher=Cambridge University Press|year=2003|isbn=9781139439077|location=Cambridge and New York|pages=1|language=en}}</ref><ref>{{Cite book|chapter-url=https://books.google.com/books?id=SeNBPFnM0KEC&q=1267+Statute+of+Marlborough+oldest&pg=PA194|title=Hypertext: Concepts, Systems and Applications: Proceedings of the First European Conference on Hypertext, INRIA, France, November 1990|last1=Streitz|first1=N.|last2=Rizk|first2=A.|last3=Andre|first3=J.|last4=André|first4=J.|publisher=Cambridge University Press|year=1990|isbn=9780521405171|location=Cambridge and New York|pages=194|language=en|chapter=Links and Structures in Hypertext Databases for Law}}</ref>