Columbia subject headings:
Historic sites--Law and legislation--Congresses.
Real property and taxation--Congresses.
Tax exemption--Law and legislation--Congresses.
Harvard subject headings:
Historic sites--Law and legislation--Congresses.
Real property and taxation--Congresses.
Tax exemption--Law and legislation--Congresses.
Princeton subject headings:
Historic sites--Law and legislation--Congresses.
Real property and taxation--Congresses.
Tax exemption--Law and legislation--Congresses.