A secret passageway into the palace vaults, a door, and a Magicked Stone to open the way.Old Dalan
The palace is located within the Royal City of Rabanastre. The player can access it via a secret entrance in the Garamsythe Waterway, but it can never be visited again.
A short walk north from the center of Rabanastre will lead you to the gates of the royal palace. Before the war with Archadia, this magnificent structure was home to the Dalmascan royal family, and barracks to the order of knights that served them. It is currently employed as a living quarters and apartments by the recently appointed consul from Archadia. The palace itself was built several centuries ago and has since been home to many Dalmascan monarchs, King Raminas being the most recent. Numerous additions have been made to the palace over the course of its long history (the Royal City of Rabanastre having several times fallen under the control of foreign powers through invasion), but the overall bearing of its architecture is true to the original Galtean design. Within the palace are secret chambers containing documents and treasures belonging to the royal family. Few who live beyond the palace walls know how they may be found.Sage Knowledge 41
The Cellars area has many treasures, but one of them is a forbidden chest that, once claimed, prevents the player from obtaining the Zodiac Spear (the game's most powerful weapon) in Necrohol of Nabudis. When sneaking into the Palace, there are several chests in the Cellar.
The forbidden one is among the two chests in the southeast corner. The forbidden chest contains an Elixir, while all the others have common items like Potions and Antidotes, so the player can easily reset the game if they take the wrong treasure.
The concept of forbidden chests was removed in the International Zodiac Job System version.
New Consul, Vayne Solidor, has been appointed to the city of Rabanastre, and to commemorate the event a grand fete is held. A local thief, Vaan, full of hatred toward the Empire that has taken everything from him, wants to sneak inside the Palace during the fete and rummage its treasure rooms to "take something back for the people of Dalmasca".
Vaan finds his way to Old Dalan who knows a hidden way inside the Palace from the Garamsythe Waterway, but Vaan will need to use the Sunstone to get in. Vaan completes a quest on the Giza Plains to get the required stone, and heads down to the sewers.
Once inside the Palace Vaan sneaks past the Palace guard. With the Sunstone Vaan opens the way to the secret treasure room and finds the Goddess's Magicite inside, but is caught by two sky pirates, Balthier and Fran, who demand he hand it over. Vaan refuses and makes a run for it, but right as he is escaping through the Palace grounds the Resistance attacks the Palace. Amidst the fighting Vaan is rescued by the sky pirates, but the magicite Vaan is holding drains the pirates' hoverbike's power, and the trio crash-land in the Garamsythe Waterway.
After the events, the Royal Palace of Rabanastre can never be visited again.
The map for the palace is found in an urn in the Cellar Stores area. If the player misses the map it can still be acquired by purchasing from a cartographers' moogle in Old Archades' Alley of Low Whispers for 100,000 gil.