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 founded in the late 19th century. It possesses 5,000 pieces of art in four buildings. Since 1981, it has had a section for Mexican art donated by Mexican painters in honour of the 1,300-year anniversary of the Bulgarian State. On 5 September 2014, Plovdiv was selected as Bulgarian host of European Capital of Culture in 2019. The city will co-host the event with Matera and another city (yet to be decided). After Plovdiv was elected as European Capital of Culture in 2019, an ambitious cultural program has started its realisation. According to this program, there will be an Island of