Short explanation: each newspaper is a dot, 754 in total, and ordered by Dateoffirstissue. The size of the dot represents the amount of pages. The color of the dot is linked to the Partner ID. A dot with a solid center has Status: Done, and dots with a white core have some other status (partial/ongoing/etc). You can toggle the language of the paper with the buttons below the chart, and by clicking on the dot you can see some extra info.
The data comes from the MediaSources Drive document (wp-2). I did a little parsing and cleanup and imported it into a sqlite db so I could query the data, but I didnt change anything, so this chart should represent the current state of the source material.