 It has the advantage of recognising the unity of styles across Britain and Ireland, while avoiding the use of the term "British Isles", a sensitive topic in Ireland, and also circumventing arguments about the origins of the style, and the place of creation of specific works, which were often fierce in the 20th century, and may be reviving in the 21st.Some sources distinguish between a "wider period between the 5th and 11th centuries, from the departure of the Romans to the beginnings of the Romanesque style" and a "more specific phase from the 6th to 9th centuries, between the conversion to Christianity and the Viking settlements".C.