The Royal Armoury sits inside the Royal Palace of Madrid, just past the grand staircase on the first floor. It’s tucked away, almost like a secret hall of kings, but easy to find once you're inside the palace. You don’t need to walk far or take any hidden passageways.
The main entrance to the Royal Palace is on Calle de Bailén, right in the heart of Madrid. The closest metro stop is Ópera, served by Lines 2, 5, and R. From there, it’s a short walk to the palace gates.
Once you’ve entered the palace, just follow the route toward the main exhibition halls. The Armoury is well signposted, and staff are happy to point you in the right direction.