 
The Castle of Armor is a location in World One of The Final Fantasy Legend.
Unlike the Castle of Shield everyone here is friendly and tells you that the King wishes to speak on the Second Floor. The King speaks with Charcter 4 about how he is in love with a woman from the Southern Town but she turned down her propsal.
After Defeating the Bandit when you return the girl is there and the King rewards you with the King Armor.