Is it permissible to give Zakat al-Mal (obligatory charity on wealth) to an orphanage for orphans and foundlings?

It is permissible to give zakat to an orphanage for foundlings due to the poverty of the children within it, on condition that it is spent on them and not used for buildings. An orphanage for orphans is like an orphanage for foundlings, but zakat funds should only be spent on those orphans who are poor or needy.