The additional download files for Patrons can be found in the following posts (specific to your tier) or from the Master Map Index or the Descent into Avernus Index posts.
This is my interpretation of the Dungeon of the Dead Three in Baldur's Gate, from the module, Descent into Avernus.
Dungeon of the Dead Three. Welcome to the dungeon. Hidden below the bathhouse lies the dungeon, home to devout followers of the Dead Three: Bane, Bhaal, and Myrkul.
Dungeon of the Dead Three - Descent into Avernus is unofficial Fan Content permitted under the Fan Content Policy. Not approved/endorsed by Wizards. Portions of the materials used are property of Wizards of the Coast. ©Wizards of the Coast LLC.