{"version":"1.0","provider_name":"Taco Tichelaar","provider_url":"https:\/\/tacotichelaar.nl\/wordpress","author_name":"admin","author_url":"https:\/\/tacotichelaar.nl\/wordpress\/author\/admin\/","title":"Jacob Fredrik Roelof Roosdorp","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"sGJdmjPlkQ\"><a href=\"https:\/\/tacotichelaar.nl\/wordpress\/jacob-fredrik-roelof-roosdorp\/\">Jacob Fredrik Roelof Roosdorp<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/tacotichelaar.nl\/wordpress\/jacob-fredrik-roelof-roosdorp\/embed\/#?secret=sGJdmjPlkQ\" width=\"600\" height=\"338\" title=\"&#8220;Jacob Fredrik Roelof Roosdorp&#8221; &#8212; Taco Tichelaar\" data-secret=\"sGJdmjPlkQ\" 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:\/\/tacotichelaar.nl\/wordpress\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","description":"Fredrik Roosdorp werd op 9 oktober 1839 in Haarlem geboren, dus niet in Amsterdam, zoals lange tijd werd aangenomen.1 Zijn vader was Sietse Johannes Roosdorp, zijn moeder was Johanna Catharina Willer, beide geboren in Haarlem. Zijn vader werkte voor de Hollandsche spoorwegmaatschappij en was eerst opzichter, later stationschef. Het gezin verhuist naar de omgeving van &hellip; Lees verder &rarr;","thumbnail_url":"https:\/\/tacotichelaar.nl\/wordpress\/wp-content\/uploads\/2026\/06\/tG5grKuPq1PGcjGnKtNUuTv0DVR6_sBdqlG-rTxwIPkPr2Eb1WvBVLdBMsM7EBgRgynAg3RQgAHnbRNaMg4Ptt4f.jpg"}