What is the X in X-mas?
partido (county), Gran (Greater) Buenos Aires, Argentina, northwest of the city of Buenos Aires, in Buenos Aires provincia (province). The early settlement of the area centred on the agricultural plantation of San Jose del Pilar, founded by Adolfo Sordeaux in 1862. Ten years later Sordeaux established the town of San Miguel. In 1889 it became the capital of the former county of General Sarmiento.