| Qianmen : The South Front Gate of Inner City 1900 | Qianmen : The South Front Gate of Inner City 1750 |
| Qianmen in Ein Tagebuch in Bildern, published by 1902 | Qianmen in The Complete Map of Peking, Qianlong Period. |
| http://dsr.nii.ac.jp/toyobunko/La-161/V-1/page/0053.html.en |