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 Airport and Frankfurt) in 2015 after two years of stable operation. The government have started the first concession procedure back in 2011, but there were no candidates for it. The second attempt for the concession was made in the spring of 2016 when the government have opened a tender for a 35 years concession of the airport, but the tender was shortly cancelled for non-compliance with European rules. In December 2016 the government opened the 3-rd tender for the concession. In the new procedure 3 companies have made the bid for the airport - Silk Road Plovdiv Airport, Consortium Plovdiv Airport