Pedro Romero de Terreros (1710–1781), the first Count of Regla, was a mining magnate and philanthropist in 18th century colonial Mexico.

[9] According to a contemporary account, Romero de Terreros's trip may originally have been to settle his brother's estate, but he chose to stay and assist his uncle.

[8] On his arrival, he followed a local practice of recent European immigrants using the honorific "don", a title which in Spain was reserved for the minor nobility (hidalgos).

[3] According to the will, Romero de Terreros would receive one-third of the profits from any future business, with the rest to be shared by Vázquez's children.

Spanish King Ferdinand VI granted Romero de Terreros a special exemption so that he could be inducted into the order from Querétaro rather than have to travel to Spain for the ceremony.

[11] Romero de Torreros' management of the mines at Pachuca and Real del Monte resulted in a miner's strike in 1766 after he abolished the workers' party.

[19] Romero de Terreros promised to give her 50,000 pesos if he died first,[20] and, as a wedding present, gave her a large amount of jewelry, including two dresses covered in diamonds, and sponsored dowries for several young women to join convents in the city.

[21] The wedding celebration lasted two days and cost over 66,000 pesos, much more than Romero de Terreros would later pay for his home in Mexico City.

[21] After hearing that authorities were considering establishing a mission to the Lipan Apache tribe in Spanish Texas, Romero de Terreros volunteered to provide initial funding for the effort.

[29] In 1762, Romero de Terreros commissioned a painting to honor his cousin who had died in the attack on the San Sabá mission.

Another of his descendants, Manuel Romero de Terreros, wrote the first modern biography of him in 1943, but Courturier calls this book "a hagiographic and uncritical account".