Home to the Council on Foreign Relations, the historic Harold Pratt House was constructed in 1919 as one of New York’s grand Park Avenue mansions. It is an ideal location for celebrations, dinners and conferences. The House features a marble stairway that connects the ballroom with a variety of other beautiful spaces. Peterson Hall, with its own private entrance, offers state-of-the-art audiovisual equipment and can be utilized for weddings and social entertaining or as a general meeting space. The Peterson Hall can be used alone or in combination with the Harold Pratt House.