1. One by one, tesserae were pressed into the mortar, which squeezed up between the pieces.

2. In some houses of worship, tesserae cover almost every inch of the interior walls and vaults.

3. A cyclomorial platelet or 'tessera' is a polygonal element with a primordial tubercle (it can be situated Concentrically or eccentrically in relation to a geometric centre of a tessera), Concentrically surrounded by much smaller and simpler tubercles (Ibid., pp.