Emperor's Robe (Oblivion)

The Emperor's Robe is the unique-looking robe worn by the leader of the Empire. It is the robe worn by Uriel Septim at the beginning of Oblivion, and Titus Mede II in Skyrim.

How to obtain the Emperor's Robe in Oblivion
The Emperor's robe cannot be normally obtained as Baurus orders you to leave the Emperor's body alone. However, the robe is obtainable through these instructions.

1. Become Arch Mage and get the Staff of Worms

2. Become level five

3. Obtain the Skull of Corruption through the Shrine of Vaermina quest

4. Travel to the sewers (must be the place were you came out off at the start, the same sewers)

5. Reincarnate the Emperor with the Staff of Worms

6. Zap him with the Skull of Corruption

7. Kill the clone then stop and save before it hits the ground and disappears

8. Reload and as you are keep pressing A (Xbox 360) X (PS3) Spacebar (PC) and you can search him and get the robes and shoes

Please note; do not deliver the Amulet of Kings to Jauffre, or begin the Dark Brotherhood quest Scheduled for Execution, as both make the Emperor's dead body disappear. You can substitute the Risen Flesh spell from the Hill of Suicides quest for the Staff of Worms.

How to obtain the Emperor's Robe in Skyrim
Obtaining the Emperor's Robe in Skyrim is much easier. You will have two chances to loot the robe during the Dark Brotherhood quest line.

First is during the quest To Kill An Empire, and secondly in the final quest, Hail Sithis!. Simply loot the robe off the body(s) of your mark(s). There are no repurcussions for doing this. A third copy of the robe may be found within the Emperor's sleeping quarters on board the Katariah, through the door on the left upon entering the room where you assassinate the Emperor.