I'm reminded of the murals I saw in ancient Roman ruins I visited in Italy and in Bath, England. A classic mural like this combined with columns lends a feel of timelessness.
Many tile vendors will turn any image you want into a mural, and you put up consecutively numbered sheets. Are you artistic? You can buy glass tile called smalti, which is the exact kind used in Italy for murals, and create your own design, reducing some of the expense. Take a craft class in mosaic. It's fun and a great creative outlet.