the artist, whose digitalization was begun in 2010. This collection consists of 102,908 documents and images with elements such as correspondence with contemporary intellectuals, writers and politicians, including that from the Siquieros was incarcerated in Lecumberri from 1960 to 1964. It also includes 7,000 postcards from Germany alone, and 10,000 photographs of family and 80,000 texts written about the artist. History Over its first forty years, the building suffered significant deterioration to its structure and its murals. The deterioration of the mural work is due to environmental factors and the materials Siquieros used to create the piece. In 2011, remodeling work was begun on the facility to mark its fortieth anniversary. Some restoration work had been performed in 2011, but lack of funds has prevented completion. References External links The Polyforum's web page Cultural centers in Mexico Theatres in Mexico City Benito Juárez, Mexico City Murals in Mexico Works by David Alfaro Siqueiros 1971 murals 1971 paintings Arts in Mexico Buildings and structures in Mexico City Buildings and structures completed in 1971 1970s in Mexico City 20th-century architecture in Mexico Tourist attractions in Mexico City Modernist architecture in Mexico