Painted during the Song dynasty by the artist Zhang Zeduan, this scroll is believed to be the earliest extant version of the famous Qingming shanghe tu 清明上河圖 Most scholars now accept this as the earliest extant version of the scroll … and date it to the twelfth century.
Cool way to add context and more information to a (literally long thus difficult to view on screens) historical document, to understand a) what’s going on and b) what’s important to notice, what’s important for the time period, what to learn from it.