History of Plovdiv plant for electrical apparata, tobacco plant, canning factory, motor-truck factory and many others. On 6 April 1956 the first trolleybus line was opened and in the 50s the emblematic Trimontsium Hotel was constructed. In the 60s and 70s there was construction boom and many of the modern neighborhoods took shape. In the 70s and 80s many antique remains were excavated and the Old Town was fully restored. In 1990 the Sports complex "Plovdiv" was finished. It included the largest stadium and rowing canal in the country. In that period Plovdiv became the birthplace of Bulgaria's movement for democratic reform, which
Plovdiv Province capital is the city of Plovdiv; other towns include Karlovo, Sopot, Klisura, Kalofer, Hisarya, Saedinenie, Rakovski, Brezovo, Stamboliyski, Krichim, Perushtitsa, Sadovo, Parvomay, Asenovgrad, Laki, Katunica, Yiagodovo. Plovdiv Province had a population of 715,904 (715,816 also given) according to a 2001 census, of which were male and were female. As of the end of 2009, the population, announced by the Bulgarian National Statistical Institute, numbered 701,684 of which are over 60 years of age. The following table represents the change of the population in the province after World War II: Total population (2011 census): 683 027<br> Ethnic groups (2011 census): Identified