Finding the Royal Treasury Key in Kingdom Come: Deliverance 2's Oratores quest can be tricky. This guide provides a step-by-step solution.
The Oratores quest, a lengthy main questline, requires obtaining the Royal Treasury Key after assisting Vavak. The key is hidden in an unexpected location.
To acquire the key, locate the outhouse in Vavak's backyard (see map below).

Inside the outhouse, examine the toilet. An "Investigate" prompt will appear. Interact with it to retrieve the key. Be warned: this will dirty Henry, so wash up before continuing the quest to avoid dialogue issues with NPCs.

With the Royal Treasury Key in hand, return to Zizka and Rosa to advance the quest, eventually exploring the underground passages with Samuel. The quest remains substantial, so prepare for a significant time investment.
This concludes the guide to obtaining the Royal Treasury Key. For further Kingdom Come: Deliverance 2 assistance, including Lower Semine woodcutters' treasure locations and optimal perk selections, consult The Escapist for additional resources.
