historic district
... that the oldest building in downtown Waterbury, Connecticut, has been so extensively altered that it is not a contributing property to the historic district?
... that the oldest building in downtown <a href="./Waterbury,_Connecticut" id="mwCVQ" rel="mw:WikiLink" title="Waterbury, Connecticut">Waterbury, Connecticut</a>, has been so extensively altered that it is not a <a href="./Contributing_property" id="mwCVU" rel="mw:WikiLink" title="Contributing property">contributing property</a> to the <b id="mwCVY"><a href="./Downtown_Waterbury_Historic_District" id="mwCVc" rel="mw:WikiLink" title="Downtown Waterbury Historic District">historic district</a></b>?