Known. The city of Minanbé had no looters' trenches.
Minanbé is in the Calakmul Biosphere Reserve, in Campeche, Mexico. Its name comes from Maya words for "there is no" and "path", because the ruins are hard to reach. Carved writing includes the date 849 AD. The city covers about 15 hectares. It has plazas, palaces, terraces, water channels, and a temple pyramid more than 40 feet tall, built in the Río Bec style. The team found 14 standing stones and altars. One broken stone shows a ruler in a feathered headdress and part of a Long Count date, likely from the late 7th century AD. The city had sat undisturbed for more than a thousand years.
Much of the site is still under earth mounds. The page says later work will look at whether people from the northern Yucatán changed the city's power after it was left.