History and population growth have led to other communities being established in the area. In the colonial period up until the 19th century, the main industry was textiles. Textile factories were built in the area now known as Colonia Contreras. The grounds of the former El Águila textile mill are now the Foro Cultural (Cultural Forum), inaugurated in 1979. Remains of the mill's installations, such as its smokestack, still remain, but it is now a wooded area with an auditorium, gallery, offices, workshops and libraries. Near the Foro is the Purísima Concepción Church. It was founded in the 16th century, but the current structure was built in the 17th by the Contreras family, owners of the El Águila mill. It offered mass to textile workers. The area's former rail station, Estación Ferrocarril de Cuernavaca, is now a park. It contains a large mural by Ariosto Otero called "El viaje del siglo veinte" (Voyage of the 20th Century) that features the "501" train. This train carried famous passengers such as Diego Rivera, Tin Tan, and Lilia Prado.