Mosaics are constructed from small pieces of stone called what?

Mosaics are constructed from small pieces of stone called tesserae. These stones are used to create decorative art forms for interior decoration purpose. Mosaics are also used for making floors. Mosaic art is not new at all. It started in the 3rd millennium BC in Mesopotamia. Mosaic also played a big role in Islamic art. Many mosques used the Mosaic for decorative purposes.  Mosaic art was not limited to any one religion or culture. This art was used equally by the Christian community for decorative purpose.

Answer the awkward tilt of the room and the linear brushstrokes on the floor (encourage the viewer into the space) this is all i could find, so plz check if it is right or wrong/// good luck