historic districts
...that there are over 2,300 local historic districts in the United States?
...that there are over 2,300 local <b id="mwAas"><a href="./Historic_district" id="mwAaw" rel="mw:WikiLink" title="Historic district">historic districts</a></b> <i id="mwAa0">(pictured)</i> in the <a href="./United_States" id="mwAa4" rel="mw:WikiLink" title="United States">United States</a>?