Bump maps on plaster, metal, stone, and mortar.
The image below was made in Maya and rendered with mental ray. The plants inside the building were made with PlantFactory.
The blue and white plasters were made with two seamless plaster textures used as the color of two mental ray materials. Each material has a bump map made from the plaster texture used for its color.
The roof of the structure was made with a gold steel seamless texture used as the color of a Blinn. The reflectivity, eccentricity, and specular rolloff were cranked up to make the material shiny. The same gold steel texture was used to give the roof a deeper sense of depth.
You can click on this image to blow it up:
Below is a close-up of the front of the structure. Note the heavy use of bump maps in the stone and mortar on the top of the arches. This is crucial to making them look realistic. Again, you can click on this image to blow it up.