Richard's Villa is a location from The Legend of Zelda: Link's Awakening. Located on the southern border of Pothole Field in southern Koholint Island, it is where Richard resides after he is chased out of Kanalet Castle.
Aside from Richard, many frogs can be found in Richard's Villa. This is a likely reference to his original game Kaeru no Tame ni Kane wa Naru (translated as For the Frog the Bell Tolls). The music that plays in the Villa is also a remix version of the main theme of Kaeru no Tame ni Kane wa Naru. Additionally if Link remains in the villa for two and a half minutes the main theme will be replaced with Tokata's Theme, a small sample of music hidden in many games worked on by the composer Kazumi Totaka.
When Link retrieves all of Richard's Golden Leaves from Kanalet Castle, the swordsman will allow Link to pass through his basement to Pothole Field as a reward for finding all of them. Here, Link retrieves the Slime Key, needed to gain access to the Key Cavern, the third dungeon in the game.