Throughout the series, the Room of Requirement has provided many things, all "according to the seeker's needs". From chamber pots to makeshift dueling clubs to hidden storeroom, the Room of Requirement has done it all.
Where do these items come from?
I know that the Room of Hidden Things (one version of the Room of Requirement) takes all its content from items hidden there by its users, but the origin of the rest of the contents is murky.
Are these items conjured by the room itself, which for all intents and purposes seems sentient, or are they pulled from elsewhere in the school?