Expo 1985 Plovdiv was an international exposition that took place from November 4âÂÂ30, 1985 in Plovdiv, Bulgaria. The exhibition had the theme "The Achievements of Young Inventors". The specialized exhibition was the 24th held by the Bureau International des Expositions and the second held in Plovdiv. Another specialized exposition, Expo '85 in Tsukuba, Japan occurred the same year.