Romanizer
/ˈrəʊmənʌɪzə/noun
1A person who favours or adopts Roman Catholic practices, doctrines, etc.; (also in the pre-Reformation Church) a supporter of the influence of Rome in Church affairs.
2A person who seeks to bring someone or something under the influence or authority of ancient Rome, or who follows or imitates Roman custom or practice.
Origin
Mid 17th century; earliest use found in William Prynne (1600–1669), pamphleteer and lawyer. From Romanize + -er.