This is my second sampler from page 93. Mrs Lantz refers firstly to the group: Mosaics. Then the stitch: a flat stitch. She states the source design is the Venetian San Marco Cathedral medieval mosaics. Most of the interior mosaics were completed by the 1270s and then restored by different artisans over the preceding centuries. Wikiwand provides a good description of the religious iconography of the mosaics and we are told highly regarded artists such as Veronese, Titian and Tintoretto prepared cartoons for the mosaicists to interpret. My interpretation of the stitch template uses three shades of green and I have couched a yellow wool thread around the outside.
(This photograph was taken by Ricardo Andre Frank, in 2005, of the mosaics in the San Marco Cathedral in Venice and can found in Wikipedia.)