{"id":617431,"date":"2026-01-18T18:36:07","date_gmt":"2026-01-18T17:36:07","guid":{"rendered":"https:\/\/cronologia-universale.it\/1281-3\/"},"modified":"2026-01-18T18:36:07","modified_gmt":"2026-01-18T17:36:07","slug":"1240-1267","status":"publish","type":"post","link":"https:\/\/cronologia-universale.it\/en\/1240-1267\/","title":{"rendered":"1240 &#8211; 1267"},"content":{"rendered":"<p>The friar Roger Bacon (who is not Francis Bacon, who lived, instead, in the 17th century) studies rainbow, human eye, gunpowder, new calendar (which will be Gregorian) and predicts telescope, glasses, airplanes, motor ships, machines and engines indicating in experiments the only source of truth.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The friar Roger Bacon (who is not Francis Bacon, who lived, instead, in the 17th&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[43],"tags":[],"class_list":["post-617431","post","type-post","status-publish","format-standard","hentry","category-vg-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>1240 - 1267 - Cronologia Universale<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cronologia-universale.it\/en\/1240-1267\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"1240 - 1267 - Cronologia Universale\" \/>\n<meta property=\"og:description\" content=\"The friar Roger Bacon (who is not Francis Bacon, who lived, instead, in the 17th...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/cronologia-universale.it\/en\/1240-1267\/\" \/>\n<meta property=\"og:site_name\" content=\"Cronologia Universale\" \/>\n<meta property=\"article:published_time\" content=\"2026-01-18T17:36:07+00:00\" \/>\n<meta name=\"author\" content=\"Rick\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Rick\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/cronologia-universale.it\/en\/1240-1267\/\",\"url\":\"https:\/\/cronologia-universale.it\/en\/1240-1267\/\",\"name\":\"1240 - 1267 - Cronologia Universale\",\"isPartOf\":{\"@id\":\"https:\/\/cronologia-universale.it\/#website\"},\"datePublished\":\"2026-01-18T17:36:07+00:00\",\"author\":{\"@id\":\"https:\/\/cronologia-universale.it\/#\/schema\/person\/f510f53010edc7a70b16caecf1c4af03\"},\"breadcrumb\":{\"@id\":\"https:\/\/cronologia-universale.it\/en\/1240-1267\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/cronologia-universale.it\/en\/1240-1267\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/cronologia-universale.it\/en\/1240-1267\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/cronologia-universale.it\/en\/universal-cronology\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"1240 &#8211; 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