Lima's grand Plaza Mayor (also called the Plaza de Armas or Main Square), the original center of the city and the site where Francisco Pizarro founded the city in 1535, is essentially a modern reconstruction. The disastrous 1746 earthquake that initiated the city's decline leveled most of the 16th- and 17th-century buildings in the old center. The plaza has witnessed everything from bullfights to Inquisition-related executions. The oldest surviving element of the square is the central bronze fountain, which dates from 1651. Today the square, although perhaps not the most beautiful or languid in South America, is still rather distinguished beneath a surface level of grime and bustle (and it has been named a UNESCO World Heritage Site). The major palaces and cathedral are mostly harmonious in architectural style and color. (The facades are a mix of natural stone and a once-bold yellow color now dulled by smog and mist.)