1.0Deutschlandmuseumhttps://www.deutschlandmuseum.de/en/ricihttps://www.deutschlandmuseum.de/en/author/rici/rich600338<blockquote class="wp-embedded-content" data-secret="J5IP631afS"><a href="https://www.deutschlandmuseum.de/en/history/calendar/1427-10-28-defending-frisian-freedom/">Defending “Frisian freedom”</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.deutschlandmuseum.de/en/history/calendar/1427-10-28-defending-frisian-freedom/embed/#?secret=J5IP631afS" width="600" height="338" title="“Defending “Frisian freedom”” — Deutschlandmuseum" data-secret="J5IP631afS" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !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); //# sourceURL=https://www.deutschlandmuseum.de/wp-includes/js/wp-embed.min.js </script> https://www.deutschlandmuseum.de/wp-content/uploads/2025/10/28101427_Friesische_Freiheit-768x432.jpg600338Friesland was one of the few regions of the Holy Roman Empire where the feudal system, based on the dependence of serf farmers, was unable to establish itself. Instead, the Frisians were free individuals enjoying a state known as “Frisian freedom”. [...]