Plovdiv printing-press. The city's traditions as a literary centre are preserved by the first public library in Bulgaria, the Ivan Vazov National Library, the 19 "chitalishta" (cultural centres), and by numerous booksellers and publishers. The library was founded in 1879 and named after the famous Bulgarian writer and poet Ivan Vazov who worked in Plovdiv for five years creating some of his best works. Today the Ivan Vazov National Library is the second largest national library institution with more than 1.5 million books, owning rare Bulgarian and European publications. The city has traditions in iconography since the Middle Ages. During the
History of Plovdiv the city in development of modern trade, banking and industry. In 1939 there were 16,000 craftsmen and 17,000 workers in manufacturing factories, mainly for food and tobacco processing. During the Second World War the tobacco industry expanded as well as the export of fruit and vegetables. In 1943 1,500 Jews were saved from deportation in concentration camps by the archbishop of Plovdiv Cyril who later became Bulgarian Patriarch. During the period of communist governance that followed the end of World War II many large factories were built in and nearby Plovdiv, for example a plant for non-ferrous metals, textile works,