North Castle

The North Castle, or North Palace, is a location in The Adventure of Link. It has also appeared in other non-canonical media such as the Valiant Comics, the Zelda animated series, and The Shadow Prince.

The Adventure of Link
The North Palace is the resting place of the slumbering princess, Zelda. As Link goes out on his adventure in search of the Crystals that will open the entrance to the Great Palace, he can return to the North Palace at any time. In the case that Link ends up getting a Game Over, he will have to start over in North Castle.

Animated series
The North Castle is also considered to be a key place in the animated series. Most of the episode's title cards portray a view of the castle, since it is the usual location where the episodes start off. Link, Zelda, Spryte and King Harkinian reside there full time, and the castle is portrayed to be much larger than in the games and the Valiant Comic series. The castle also seems to host various events such as the Magician's Contest, which take place in the castle's enormous courtyard.

Just like Hyrule Castle, the North Castle is prone to coming under attack by Ganon or his minions since the Triforce of Wisdom is kept away in one of the castle's towers. Due to this, Ganon is known to go to extreme measures to try and obtain the Triforce, such as in "That Sinking Feeling", where Ganon pulls the castle into the Underworld in hopes of easily retrieving the sacred relic. North Castle also seems to have a rather weak security since most of the time, Ganon and his minions seem to easily enter the castle's inner walls without getting noticed by the guards.

Valiant Comics
The North Castle is a main location in The Legend of Zelda Valiant Comics. Link and Princess Zelda live here while they fight against Ganon's evil forces during the events that take place after The Legend of Zelda and The Adventure of Link. It is portrayed as the home of Princess Zelda and her father, King Harkinian, and later Link himself, after the events of the first two games. The people of Hyrule come to engage in economic activity in the marketplace that is located in the courtyard of the castle (much like the castle's spiritual successor in the following years, Hyrule Castle). There are also several towers and buildings within the main structure, primarily a tower each for both Link, where the Triforce of Wisdom is kept, and Zelda and a residence for King Harkinian, which is the largest room in the entire castle.

The Shadow Prince
In The Shadow Prince, North Castle is first introduced after Princess Zelda invites Charles of Moria to meet the King of Hyrule. Although much of Link's adventure takes place outside the castle, a great part of the story develops here. It is in a secret chamber known as the Triforce Room where the Triforce of Wisdom is safely kept away from the hands of Ganon. Princess Zelda, the king, and Impa all dwell in the castle.

In the book, the king quickly trusts in Charles and decides to show him the Triforce of Wisdom. He leads the Morian knight into the Triforce Room, where he dubs him a Knight of the Triforce and asks him to protect it and to keep it away from Ganon's hands. Later on in the book, after Link uses the Mirror of Truth to reveal that Charles is in fact Ganon in disguise, Charles will manage to steal the Triforce of Wisdom from the Triforce Room and escape with it into the Midoro Swamp, where Link must follow him to defeat him and bring peace back to Hyrule.

The Tower, which is situated in the most remote part of North Castle, is the location in which the castle's prisoners are kept. In the case that Link accuses Charles of being evil without having proof to back it up, he will be sent here as punishment, and the only means of escape will be to use the Golden Whistle or the Clock given to the young hero by Impa.

Once Link manages to defeat Ganon, he will return to the North Castle with the Triforce of Wisdom in hand, where the king will thank him for having saved Hyrule once again and thus decides to celebrate his victory against Ganon.