Trujillo's wrought-iron window railings are a unique feature of the mansions. The House of Ganoza-Chopitea ("casa Ganoza") has a polychromatic front in the baroque style, crowned by a rococo frontispiece and two lions. It is the city's most representative example of "casonas" architecture. Another is the House of Mayorazgo, which was built in the early years of the city and holds one of Peru's greatest numismatic collections. The revolutionary leader Simón Bolívar lived in a house on the Plaza de Armas.