Blackfriars was an area of London.
The Doctor's TARDIS, carrying the Twelfth Doctor and Bill Potts, landed on Blackfriars Bridge next to New Lime Wharf during the 1814 frost fair. The fair stretched from Blackfriars to London Bridge. (TV: Smile, Thin Ice)
When the boxer Rick Bellamy told Strax he would be fighting the champion from Blackfriars, Strax misunderstood him and thought he was talking about actual black friars. (PROSE: Silhouette)
On Pete's World, Mr Crane collected homeless people in Blackfriars to be converted into Cybermen. (TV: Rise of the Cybermen)
Blackfriars was seen on a map of London used during the Monk invasion of the late 2010s. (TV: The Lie of the Land)