1.0Friends of Searchhttps://friendsofsearch.com/nlmarcohttps://friendsofsearch.com/nl/author/marco/rich600338<blockquote class="wp-embedded-content" data-secret="toTqu7wK1o"><a href="https://friendsofsearch.com/nl/blog/news/in-memoriam-lennert-de-rijk/">In memoriam Lennert de Rijk</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://friendsofsearch.com/nl/blog/news/in-memoriam-lennert-de-rijk/embed/#?secret=toTqu7wK1o" width="600" height="338" title="“In memoriam Lennert de Rijk” — Friends of Search" data-secret="toTqu7wK1o" 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://friendsofsearch.com/nl/wp-includes/js/wp-embed.min.js </script> https://friendsofsearch.com/nl/wp-content/uploads/sites/4/2026/06/In-memoriam-Lennert-de-Rijk.jpg900600It is with great sadness that we recently had to say goodbye to Lennert, co-founder of Friends of Search. With his vision, dedication and powers of persuasion, he made an indispensable contribution to the event and to the success that Friends of Search is today — from the very first moment. Friends of Search did […]