Rococo was a style of architecture.
The Fourth Doctor noted that his newly decorated President's office was a "bit rococo" for a purist like him. (TV: The Invasion of Time)
The Doctor asked Romana II if she would call the general architectural style of the Tower rococo, to which she replied in the negative. (TV: State of Decay)
The Marquise de Rimdelle's estate room was decorated in the rococo style. (AUDIO: Masquerade)
Parts of the cathedral visited by Iris Wildthyme had Rococo architecture. (PROSE: Iris Wildthyme and the Unholy Ghost)
The Doctor's TARDIS' Hungarian bathroom had rococo detailing. (PROSE: Chasing the Dawn)