Hey does somebody know where to find the original Texture for the Wall and paintings, etc..

I searched for them but didn`t find them. I need them because i making my own Escape room Atm (and experimenting the limits of making a Complet Costum room). For that iI want to make my own Wall textures. I tryd to just make them but the Wall are little bit wierd to just texture them whit gimp.
Im using right now a painting that resize as Wall since i cant figure the Texture style out for walls

Sry for the bad english