At First,

I thought it was just a patch of tiles,

 in an otherwise abandon building,

 but they were not,

 they had been painted on the concrete floor using stencils, rollers,

 and spray paint, they are the work of Spanish street artist Javier De Riba,

 who paints floors and uses them as his canvas instead of walls,

 it seems a shame to walk on them,

this is one of his more ambitious projects,

and a time lapse video to show how it was achieved, he uses designs from the floors of traditional Catalan homes where he was raised, recently De Riba released some limited editions of his spray painted works as prints, which You can find on both his website and Etsy, and no I am not on commission, I just thought it was neat using floors instead of walls to showcase your work.