Plovdiv reached an agreement that the Principality of Bulgaria and Eastern Rumelia had a common government, Parliament, administration, and army. Today 6 September is celebrated as the Unification Day and the Day of Plovdiv. After the unification, Plovdiv remained the second most populous city in Bulgaria after the capital Sofia. The first railway in the city was built in 1874 connecting it with the Ottoman capital, and in 1888, it was linked with Sofia. In 1892 Plovdiv became host of the First Bulgarian Fair with international participation which was succeeded by the International Fair Plovdiv. After the liberation, the first brewery
Plovdiv English Language School, the High School of Mathematics, the Ivan Vazov Language School, the National Schools of Commerce Plovdiv, the English Academy, the Academy of Music, Dance and Fine Arts Plovdiv, and the French High School of Plovdiv. The city has six universities and a number of state and private colleges and branches of other universities. Those include Plovdiv University, with 900 lecturers and employees and 13,000 students; the Plovdiv Medical University, with 2,600 students; the Medical College; the Technical University of SofiaBranch Plovdiv; the Agricultural University Plovdiv; the University of Food Technologies; the Academy for Music, Dance and Fine