A very old palace connected to Changdeokgung by means of the secret garden.
Supposedly Changyeonggung is connected to Changdeokgung by the secret garden, but that path is either not open to the public or we just got really lost. We ended up walking the entire perimeter of the gardens before finding the entrance to Changyeonggung.
Changyeonggung was by far the most unrestored palace we had seen in Seoul.
The roof of the gate did not even appear to be lacquered and had taken quite the beating from the sun. The paint had all but faded completely. It certainly looks its age (sources indicate it was destroyed by the Japanese and rebuilt in the 1600s).
We had seen these tombstone-looking things lining the courtyards of more than one palace. My understanding is that they are markers for members of the court, so they know where to stand during important ceremonies.