Monsanto Monsanto The Monsanto Company () was an American agrochemical and agricultural biotechnology corporation that existed from 1901 until 2018 when it was acquired by Bayer. It was headquartered in Creve Coeur, Missouri. Monsanto developed Roundup, a glyphosate-based herbicide in the 1970s, and became a major producer of genetically engineered crops. Monsanto was one of four groups to introduce genes into plants (1983), and was among the first to conduct field trials of genetically modified crops, (1987). It was one of the top 10 U.S. chemical companies until it divested most of its chemical businesses between 1997 and 2002, through a
Castle of Monsanto Castle of Monsanto The Castle of Monsanto () is a medieval castle located in the civil parish of Monsanto e Idanha-a-Velha, in the municipality of Idanha-a-Nova, Portuguese district of Castelo Branco. The site was likely the location of fortified settlement during prehistory. Legend suggests that during the 2nd century a castro was taken and colonized on the hilltop of Mons Sanctus, by Roman Praetor Lucius Aemilius Paullus. The castro was destroyed and progressively settled by settlers from Idanha-a-Velha. Between the 5th and 11th century was occupied by Visigoths and Arabs. In order to building a defensive line and strengthen his