11. Historical maps mark the location of Ballyduff Castle in ruins.12. For further icons and legend conventions, see Historical maps conventions. 13. Many of the Collection's historical maps have been digitized and are freely available online. 14. Listed in order of publication date | " Reference : David Rumsey Historical Map Collection" 15. The position of the frazione is attested by some historical maps since the seventeenth century. 16. Some of the earliest records of the development of the area is the historical maps . 17. :: There are several academic historical maps of China. 18. It also features historical maps , movies, photos and articles. 19. Since for example Germantown is part of Philadelphia today, a historical map would be ideal. 20. For historical maps a very serious historical, geographical and topological researches have to be done.
