{"version":"1.0","provider_name":"American Journal of Archaeology","provider_url":"https:\/\/ajaonline.org","author_name":"aja","author_url":"https:\/\/ajaonline.org\/author\/aja\/","title":"Building for Eternity: The History and Technology of Roman Concrete Engineering in the Sea | April 2017 (121.2) | American Journal of Archaeology","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"x48aJjZLGj\"><a href=\"https:\/\/ajaonline.org\/book-review\/3445\/\">Building for Eternity: The History and Technology of Roman Concrete Engineering in the Sea<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/ajaonline.org\/book-review\/3445\/embed\/#?secret=x48aJjZLGj\" width=\"600\" height=\"338\" title=\"&#8220;Building for Eternity: The History and Technology of Roman Concrete Engineering in the Sea&#8221; &#8212; American Journal of Archaeology\" data-secret=\"x48aJjZLGj\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/ajaonline.org\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","description":"The longevity of Roman construction on land is well known, and some notable concrete structures that still stand today are justifiably celebrated. The survival of Roman concrete harbor works is perhaps even more astonishing, having resisted for so long the force of the sea&mdash;modern concrete structures&nbsp;are commonly demolished after but a small fraction of the [&hellip;]"}