A project in which multiple sites without substantial and systematic content management were migrated to a single multi-domain CMS that enabled a unified way of configuration of each site by a single administrator and content moderator, despite complex and diverse nature of involved content. Many issues are expected when an established site is migrated to a new system, and the solution included handling of redirection from old locations, as well as SEO campaign that ensured lowest possible negative impact of migration on the whole system.