<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31372419</termId><termName>opus tessellatum</termName><termType>PT</termType><termNote><![CDATA[ Standard mosaic process and technique using small cubes of uniform size known as tesserae, made of hard materials such as stone and glass, applied to a ground to form ornamental patterns and pictures. While opus tessellatum was initially a cheap substitute for finer mosaic work executed in the more complex technique of "opus vermiculatum," it eventually became the dominant technique and remained so throughout the Middle Ages. ]]></termNote><termCreatedDate>2026-03-30 20:40:26</termCreatedDate><relation><relationType>UF</relationType><termId>31372420</termId><termName>tessellatum, opus</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31341703</termId><termName>mosaic</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31372423</termId><termName>opus vermiculatum</termName><termType>PT</termType></relation></term>  </Zthes>