<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">catacombs</topic></authority><related type="other"><topic>cemeteries</topic></related><related type="other"><topic>Roman</topic></related><related type="other"><topic>graveyards</topic></related><related type="other"><topic>arcosolia</topic></related><related type="broader"><topic>cemeteries by form</topic></related><variant type="other"><topic>catacomb</topic></variant><variant type="other"><topic>coemeteria</topic></variant><variant type="other"><topic>coemeterium</topic></variant> <note xml:lang="en"><![CDATA[ Underground systems of passages used as cemeteries, generally unsystematic and irregular in plan with networks of galleries and multiple levels over extensive areas. ]]></note></mads>