[eng] The ideas of the castle as well as the functions that they represent within a cultural society are aspects that attract the public worldwide. It is not just the idea of a place where a prince or king lives that attracts them but the different historical events that occurred in that place as well as its different functions from residences for the nobility to prisons used during important moments of history. The main objective of this paper is to observe how Alnwick Castle, located in Northumberland, is considered English cultural heritage. To do this, an explanation will be given about the history of castles, the idea of heritage and ending with the history of the castle itself together with the idea of how the production of films and TV series have helped the value of cultural heritage to increase, especially through the saga Harry Potter and the TV series Downton Abbey. After the analysis, it will be seen that the idea of the castle did not begin until 1066 with the Norman Conquest and that Alnwick Castle, which, on paper, is little known and culturally a little valued castle, enjoys a rich and famous history that should be known all over the world and not only for the simple fact of appearing in the film industry.