King Park on Wellington Avenue, along Newport Harbor, commemorates Rochambeau's contributions to the Revolutionary War and to Newport's history. Newport's population fell from over 9,000 (according to the census of 1774) to fewer than 4,000 by the time that the war ended (1783). Over 200 abandoned buildings were torn down in the 1780s. As well, the war destroyed Newport's economic wealth, because years of military occupation closed the city to any form of trade. The Newport merchants moved to other areas; some to Providence, others to Boston and New York. It was in Newport that the Rhode Island General Assembly voted to ratify the Constitution in 1790 and become the 13th state, acting under pressure from the merchant community of Providence. The city was the last residence of Commodore Oliver Hazard Perry and the birthplace of Commodore Matthew C. Perry and the Unitarian theologian William Ellery Channing. Summer mansions Beginning in the mid-nineteenth century, wealthy southern planters seeking to escape the heat began to build summer cottages on Bellevue Avenue, such as Kingscote (1839). Around the middle of the century, wealthy northerners, such as the Wetmore family, began construction on larger mansions, such as Chateau-sur-Mer (1852) nearby. Most of these early families made a substantial part of their fortunes in the Old China Trade. By the turn of the 20th century, many of the nation's wealthiest families were summering in Newport, including the Vanderbilts, Astors, and the Widener family, who constructed the largest "cottages," such as The Breakers (1895) and Miramar (1915). They resided for a brief summer social season in grand mansions with elaborate receiving rooms, dining rooms, music rooms, and ballrooms—but with few bedrooms, since the guests were expected to have "cottages" of their own. Many of the homes were designed by New York architect Richard Morris Hunt, who kept a house in Newport himself. The social scene at Newport is described in Edith Wharton's novel The Age of Innocence. Wharton's own Newport "cottage" was called Land's End. Today, many mansions continue in private use. Hammersmith Farm is the mansion where John F. Kennedy and Jackie Kennedy held their wedding reception; it was open to tourists as a "house museum", but has since been purchased and reconverted into a private residence. Many of the other mansions are open to tourists, and others were converted into academic buildings for Salve Regina College in the 1930s, when the owners could