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A map of a Vietnamese citadel showcasing how these fortifications looks from above in a major Vietnamese city.
Uploaded a work by * [https://1.bp.blogspot.com/-xrezC0fRhoA/YPABpMnM06I/AAAAAAAAmcc/grigKOxwx0ozJWsWUH9cH_tm3fI_Ouv6ACLcBGAsYHQ/s1040/nam%2Bdinh%2B1912_result.JPG Bản vẽ thành Nam Định 1912.], [https://www.hinhanhlichsu.org/ www.hinhanhlichsu.org]. * [https://1.bp.blogspot.com/-w0Gf5jyMCDg/YPABpnIqxbI/AAAAAAAAmck/gJEGgAhm3tUZnpZgcKdyfylc2gI1I8dtACLcBGAsYHQ/s1042/ninh%2Bbinh_result.JPG Bản vẽ thành Ninh Bình.], [https://www.hinhanhlichsu.org/ www.hinhanhlichsu.org]. * [https://1.bp.blo...
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