<?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">shell keeps</topic></authority><related type="broader"><topic>keeps</topic></related><variant type="other"><topic>keeps, shell</topic></variant><variant type="other"><topic>shell keep</topic></variant><variant type="other"><topic>shell-keep</topic></variant> <note xml:lang="en"><![CDATA[ Norman keeps, usually on the sites of older structures, and consisting of a stone wall on top of a motte, or steep mound. Within this wall, or shell, other buildings were contructed, using the wall as support, leaving an open courtyard in the center. A successor to the motte-and-bailey castle. ]]></note></mads>