On June 16, 1864, on a freight hauling trip to Piedras Negras, Coahuila, Louis Martin and his niece's husband Eugene Frantzen had gold hidden beneath a load of bacon.
Piedras Negras Municipality, a municipality in Mexico, with the center in the eponymous city
It was renamed Ciudad Porfirio Díaz in 1888, in homage to President Porfirio Díaz, but reverted to its original name following the Mexican Revolution.
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On 15 June 1850, a group of 34 men (commanded by Andrés Zapata, Gaspar Salazar and Antonio Ramírez) met with Colonel Juan Manuel Maldonado to give the news that they had created a pass point at Piedras Negras, to the right of the Rio Grande, south of Fort Duncan; and having given it the name of: Nueva Villa de Herrera.
In 1976, Shihan Toshiaki Nogiwa was sent to Mexico as a coach of Japan Shito-Kai in the cities of Monterrey, Piedras Negras, and Saltillo, Coahuila, where the club of Karate-Do of the Universidad Autónoma Agraria Antonio Narro (UAAAN)was initiated in 1977, which remains under his technical direction.
After learning to play harmonica at an early age, he moved to Piedras Negras, Mexico at age 13, where he played on radio station XEPN.
And far to the west of Calakmul, the accession of a king at Moral-Reforma in 662 took place under the auspices of Kaan, an event apparently coordinated with an attack by Piedras Negras on Moral-Reforma's neighbor Santa Elena that same year — an inscription at Piedras Negras mentions Calakmul six days before this event.
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The 2007 Piedras Negras-Eagle Pass tornadoes were a deadly pair of tornadoes that struck the border cities of Piedras Negras, Coahuila, and Eagle Pass, Texas, along the United States-Mexican border on April 24, 2007.
Yo'nal Ahk III, king of the Mayan city Piedras Negras, who ruled AD 758-767