{"version":"1.0","provider_name":"Deutschlandmuseum","provider_url":"https:\/\/www.deutschlandmuseum.de\/en\/","author_name":"rici","author_url":"https:\/\/www.deutschlandmuseum.de\/en\/author\/rici\/","title":"Holy Roman Empire vs. Prussia - Deutschlandmuseum","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"AJ1tTtLppd\"><a href=\"https:\/\/www.deutschlandmuseum.de\/en\/history\/calendar\/1757-01-17-holy-roman-empire-vs-prussia\/\">Holy Roman Empire vs. Prussia<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.deutschlandmuseum.de\/en\/history\/calendar\/1757-01-17-holy-roman-empire-vs-prussia\/embed\/#?secret=AJ1tTtLppd\" width=\"600\" height=\"338\" title=\"&#8220;Holy Roman Empire vs. Prussia&#8221; &#8212; Deutschlandmuseum\" data-secret=\"AJ1tTtLppd\" 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:\/\/www.deutschlandmuseum.de\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","thumbnail_url":"https:\/\/www.deutschlandmuseum.de\/wp-content\/uploads\/2025\/01\/17011757_HRR_gegen_Preussen-768x432.jpg","thumbnail_width":600,"thumbnail_height":338,"description":"Frederick II followed his coronation as King in Prussia with the conquest of the Austrian province of Silesia. Even after two lost wars, the Austrian Queen Maria Theresa refused to give up and forged an alliance with France and Russia; Prussia in turn allied with Great Britain. [...]"}