its headquarters building
... that the New York and Long Island Coignet Stone Company went out of business less than a decade after completing its headquarters building?
... that the New York and Long Island Coignet Stone Company went out of business less than a decade after completing <b id="mwAwk"><a href="./New_York_and_Long_Island_Coignet_Stone_Company_Building" id="mwAwo" rel="mw:WikiLink" title="New York and Long Island Coignet Stone Company Building">its headquarters building</a></b>?