Cell 2187/Legends

Cell 2187 was a detention cell located in Detention Block AA-23 aboard the first Death Star. Just prior to the Battle of Yavin, it was used for the interrogation and detainment of Princess Leia Organa. She was scheduled for execution before Luke Skywalker, Han Solo, and Chewbacca came to rescue her.

Behind the scenes
In the novelization, instead of pressing a button to open the door of Cell 2187, Luke fires a blaster pistol at the door until it's too hot for him to hold. When the smoke clears, he is amazed at the destruction he has caused.

"Cell 2187" is a reference to the short film 21-87, directed by Arthur Lipsett. It reportedly inspired George Lucas to make the film THX-1138."

In the game Star Wars: Republic Commando, during the Prosecutor stage, Commando Scorch is taken to the ship's detention block (which resembles that of the Death Star's) and is held in cell 2187.