Usually we have there five interlaced circles inscribed in a square. However, the size of circles, the
width of their “lines” can vary significantly. The two examples shown on fig. 12 and 13 show how
it may look. The first pattern uses four circles inscribed into quarters of a square. The fifth circle
fills the space between them. In the second example the size of the internal circle is much larger
than size of other circles and it dominates the while design. Finding exact geometric rules to create
these ornaments is a matter of examining measurements of thickness of lines and diameters of
circles. Finally we have to consider the width of the bands of mosaics fitted into the whole
construction.