Answer: This is a picture entitled, the Ruin's of Gallego Flour Mills, Richmond. It records an event and exists as an allegory of the costs of the civil war. This was created ad a document the hardships of the civil war, but its purpose has also become to commemorate the civil war so that we ca remember the people who suffered and the reasons why the war occurred.
The plans contain the Death Star's entire design history, including the flaw introduced into its reactor system. Stolen by Jyn Erso, they are beamed to the Profundity, copied and hidden in the memory systems of a humble astromech droid.
