Finding the Royal Treasury Key in Kingdom Come: Deliverance 2's Oratores quest can be tricky. This guide provides a clear walkthrough.
The Oratores quest, a lengthy main questline, requires obtaining the Royal Treasury Key after assisting Vavak. The key's location is a bit unconventional.
Check the outhouse (toilet) in the backyard of Vavak's house. A map screenshot is provided below for clarity.
Examine the toilet bowl; an "Investigate" prompt will appear. Clicking it will reveal the key. However, this action dirties Henry, so washing up afterward is advisable to avoid dialogue issues with NPCs.
With the key in hand, continue the quest by speaking with Rosa and Zizka, then explore the underground passages with Samuel. The Oratores quest is extensive, so prepare for a significant time commitment.
This concludes the guide to obtaining the Royal Treasury Key. For more Kingdom Come: Deliverance 2 tips and strategies, including Lower Semine woodcutters' treasure and optimal perk choices, check out The Escapist.