For each drawing, we can try to automatically derive the start and end date of the narration by two ways. We can look at the title of the work, these often include year ranges. We can also look into the works and scan appearing year nodes. We did both for all works. If the year nodes within the drawing suggest an even longer range as the title alone, we extend the range. Of the currently 51 digitized drawings, we could derive such a range for 34 works.
From this data, we included a timeline visualization on the network analysis page which illustrates what drawing cover what periods. The information is also included the “homepage” of each work.