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
PFC Lokomotiv Plovdiv prestigious tournaments. By 1944 the team is the biggest in the region of Plovdiv in terms of members, and has a dedicated following with its fans setting records for the period in attendance of football matches. In the mid-1930s the labour union of the railway workers and sailors establishes several cultural and sporting organisations across the country. The railway workers established their sports club in Plovdiv as well, since the city is one of the major travel centres in the country. On 13 June 1935 the club "ZSK Plovdiv" was founded, abbreviated from "Zheleznicharski Sporten Klub Plovdiv" meaning "the sporting