The ancient boroughs were a historic unit of lower-tier local government in England and Wales. The ancient boroughs covered only important towns and were established by charters granted at different times by the monarchy. Their history is largely concerned with the origin of such towns and how they gained the right of self-government. Ancient boroughs were reformed by the Municipal Corporations Act 1835, which introduced directly elected corporations and allowed the incorporation of new industrial towns. Municipal boroughs ceased to be used for the purposes of local government in 1974, with borough status retained as an honorific title granted by the Crown.