Plovdiv of which are high. Because of these hills, Plovdiv is often referred to in Bulgaria as "The City of the Seven Hills". Plovdiv is host to a huge variety of cultural events such as the International Fair Plovdiv, the international theatrical festival "A stage on a crossroad", the TV festival "The golden chest", and many more novel festivals, such as Night/Plovdiv in September, Kapana Fest, and Opera Open. There are many preserved ruins such as the ancient Plovdiv Roman theatre, a Roman odeon, a Roman aqueduct, the Plovdiv Roman Stadium, the archaeological complex Eirene, and others. The oldest American educational
Church of the Holy Mother of God, Plovdiv 10 January 1860 the bishop of Plovdiv Paisius held a service in Bulgarian language and publicly announced that his congregation denounced the Greek Patriarch of Istanbul which became a great scandal and Plovdiv became the most radical center for the struggle of the autonomy of the Bulgarian Orthodox Church. On 30 April Paisius organized a Church and People's counsel in which the citizens were also represented in order to discuss the church question. Plovdiv sent a delegation to the Ottoman government asking officially for an autonomous Church. That Counsel was held annually until 1870 when the Bulgarian Exarchate was recognized