Birth act of future King Leopold II of the Belgians (9th april 1835) laid under the authority of Burgomaster <a href="//commons.wikimedia.org/wiki/Category:Nicolas_Rouppe" title="Category:Nicolas Rouppe">Nicolas Jean Rouppe</a>, Civil Record Officer of Brussels
Nicolas Jean Rouppe, Bourgmestre et Officier d'État civil de Bruxelles
État civil de Bruxelles, actes de naissance, <a rel="nofollow" class="external text" href="https://familysearch.org/ark:/61903/3:1:S3HY-DH63-JQV?i=126&amp;wc=ST2B-823%3A966896201%2C967131901&amp;cc=1482191">9 avril 1835</a> <small>(open a "familysearch.org" account to read the link)</small>.