== Categories == 

 Per WP:Categorization, "An article should never be left with a non-existent (redlinked) category on it. Either the category should be created, or else the link should be removed or changed to a category that does exist." So if you are going to add a category that doesn't exist, please create it as well. However, for Otto Nagel, specifically, Category:Honorary citizens of Berlin was deleted per CfD at Wikipedia:Categories for discussion/Log/2010 October 24#Category:Honorary citizens of Berlin and shouldn't be added to articles at all. You can recreate but that could fall under deletion criteria .