The Pena-Peck House at 143 St. George Street is one of the oldest surviving colonial buildings in St. Augustine, built around 1750 by order of King Ferdinand VI of Spain as the official residence of the Royal Spanish Treasurer, Juan Estevan de Pena. It is constructed of native coquina - the shell-stone that characterizes St. Augustine's oldest buildings - and its loggia and first floor remain largely unchanged from the original Spanish colonial construction. The house has lived through every chapter of St. Augustine's history. During the British Period from 1763 to 1784, it served as the townhouse of Dr. John Moultrie, the aristocratic Lt. Governor of Florida. Governor Patrick Tonyn and his family lived here for nine years and continued conducting official British government business here after the Revolutionary War until 1785 - making the Pena-Peck House the last official seat of British government in North America south of Canada. When Spain regained Florida, the house changed hands several times through the Second Spanish Period. In 1837 Dr. Seth Peck purchased it, added the second story, and his family lived here for nearly a century until 1931. The last Peck descendant, Anna Gardner Burt, willed the house to the City of St. Augustine upon her death in 1931, stipulating it be maintained as an example of antebellum Southern homes. The Woman's Exchange, a volunteer organization founded in 1892, entered into an agreement with the city and has maintained and operated the ho