What is a picture made out of small tiles or pieces of stone typically found on floors called?

A picture made out of small tiles or pieces of stone that is typically found on floors is known as a mosaic. Mosaics were a popular form of art in ancient Roman culture, particularly in places like Pompeii and Herculaneum, where they adorned floors, walls, and other surfaces.

Mosaics are created by assembling small, colored pieces of stone, glass, or other materials (called tesserae) to form intricate designs or images. They often depict scenes from mythology, everyday life, or nature, and were valued for both their aesthetic appeal and durability.

The other terms mentioned refer to different types of art: a fresco refers to a method of mural painting on freshly laid wet plaster, dipinti are painted decorations on walls or other surfaces, and a collage is a work of art made by assembling various materials such as photographs, pieces of paper, and other objects onto a single surface. Each of these forms has distinct characteristics and historical contexts that differ significantly from mosaics.