The office of Deep Space 9's commanding officer, set above Ops behind a pair of heavy doors, used by Gul Dukat as prefect of Bajor and afterwards by Benjamin Sisko.
The commander's office sits at the top of the stairs in Ops, deliberately raised by its Cardassian architects so that those below must look up at whoever occupies it. During the Occupation, when the station was called Terok Nor, it belonged to Gul Dukat, who reminds Sisko of the fact when he visits in Emissary.
Sisko makes the room his own, most famously with the baseball he keeps on the desk. When he evacuates the station in Call to Arms he leaves the ball behind as a message that he intends to return.
Dukat keeps the baseball on the desk throughout the Dominion occupation and hands it to Sisko, a broken man, in Sacrifice of Angels. After Sisko's disappearance in What You Leave Behind, Kira is left in command of the station.