If your landlord is flexible enough to let you hang pictures, then you can probably adapt this idea from Ikea Hacker. Dawn decided that her kitchen needed color, and instead of fretting over tile or paper, came up with this cheap solution.
Dawn sandwiched Ikea FREDERIKA fabric between the glass of a CLIPS frame, hung it where she wanted it, et voila. The two narrower panels were made using similar frames from a craft store in order to get that long, narrow dimension. Needless to say this idea could be adapted with a multitude of fabrics and papers substituted for FREDERIKA.