1.0Medievalists.nethttps://www.medievalists.netSandra Alvarezhttps://www.medievalists.net/author/sandra-alvarez/rich600338<blockquote class="wp-embedded-content" data-secret="eqfY6Wi8oP"><a href="https://www.medievalists.net/2012/07/the-art-of-the-science-of-renaissance-painting/">The Art of the Science of Renaissance Painting</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.medievalists.net/2012/07/the-art-of-the-science-of-renaissance-painting/embed/#?secret=eqfY6Wi8oP" width="600" height="338" title="“The Art of the Science of Renaissance Painting” — Medievalists.net" data-secret="eqfY6Wi8oP" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /*! This file is auto-generated */ !function(c,d){"use strict";var e=!1,o=!1;if(d.querySelector)if(c.addEventListener)e=!0;if(c.wp=c.wp||{},c.wp.receiveEmbedMessage);else if(c.wp.receiveEmbedMessage=function(e){var t=e.data;if(!t);else if(!(t.secret||t.message||t.value));else if(/[^a-zA-Z0-9]/.test(t.secret));else{for(var r,s,a,i=d.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),n=d.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),o=new RegExp("^https?:$","i"),l=0;l<n.length;l++)n[l].style.display="none";for(l=0;l<i.length;l++)if(r=i[l],e.source!==r.contentWindow);else{if(r.removeAttribute("style"),"height"===t.message){if(1e3<(s=parseInt(t.value,10)))s=1e3;else if(~~s<200)s=200;r.height=s}if("link"===t.message)if(s=d.createElement("a"),a=d.createElement("a"),s.href=r.getAttribute("src"),a.href=t.value,!o.test(a.protocol));else if(a.host===s.host)if(d.activeElement===r)c.top.location.href=t.value}}},e)c.addEventListener("message",c.wp.receiveEmbedMessage,!1),d.addEventListener("DOMContentLoaded",t,!1),c.addEventListener("load",t,!1);function t(){if(o);else{o=!0;for(var e,t,r,s=-1!==navigator.appVersion.indexOf("MSIE 10"),a=!!navigator.userAgent.match(/Trident.*rv:11\./),i=d.querySelectorAll("iframe.wp-embedded-content"),n=0;n<i.length;n++){if(!(r=(t=i[n]).getAttribute("data-secret")))r=Math.random().toString(36).substr(2,10),t.src+="#?secret="+r,t.setAttribute("data-secret",r);if(s||a)(e=t.cloneNode(!0)).removeAttribute("security"),t.parentNode.replaceChild(e,t);t.contentWindow.postMessage({message:"ready",secret:r},"*")}}}}(window,document); </script> https://www.medievalists.net/wp-content/uploads/2012/07/300px-Van_Eyck_-_Arnolfini_Portrait.jpg300411During this study we began to examine paintings for the presence of optical artifacts that could serve as supporting scientific evidence for these visual observations. Here we briefly describe some of the scientific evidence contained within three paintings that demonstrate lenses were in use by certain artists to project images as early as c1425. We present only a general discussion here, and refer interested readers to previous publications for details.