Unlock the Royal Treasury with Kingdom Come 2's Oratores Quest
Finding the Royal Treasury Key in Kingdom Come: Deliverance 2's Oratores quest can be tricky. This guide provides a straightforward solution.
The Oratores quest, a lengthy main quest, requires obtaining the Royal Treasury Key after assisting Vavak. The key's location is a bit unconventional.
To acquire the key, head to the outhouse in Vavak's backyard (see map below).

Inside the outhouse, examine the toilet. An "Investigate" prompt will appear. Interact with it, and Henry will retrieve the key. Be aware that this will dirty Henry, so clean up afterwards to avoid issues with dialogue checks.

With the key in hand, continue the quest by speaking with Zizka and Rosa, then explore the underground passages with Samuel. The Oratores quest is extensive, so prepare for a significant time commitment.
This concludes the guide on obtaining the Royal Treasury Key. For more Kingdom Come: Deliverance 2 tips and strategies, including Lower Semine woodcutters' treasure and optimal perk selections, check out The Escapist.