Bulla Regia
...that the houses at Roman Bulla Regia in Tunisia were built in two levels, a ground level to catch winter sun and a subterranean one round an open atrium for coolness in summer?
...that the houses at Roman <b id="mwCBI"><a href="./Bulla_Regia" id="mwCBM" rel="mw:WikiLink" title="Bulla Regia">Bulla Regia</a></b> in <a href="./Tunisia" id="mwCBQ" rel="mw:WikiLink" title="Tunisia">Tunisia</a> were built in two levels, a ground level to catch winter sun and a subterranean one round an open <a class="mw-disambig" href="./Atrium" id="mwCBU" rel="mw:WikiLink" title="Atrium">atrium</a> for coolness in summer?