Plovdiv (Bulgarian: Пловдив) is the second-largest city in Bulgaria after Sofia with a population of 338,153 inhabitants according to Census 2011. Plovdiv's history spans some 6,000 years, with traces of a Neolithic settlement dating to roughly 4000 BC; it is one of the oldest cities in Europe
Plovdiv is situated in the southern part of the Plovdiv Plain on the two banks of the Maritsa River. The city has historically developed on seven syenite hills, some of which are 250 m (820.21 ft.) high. Because of these seven hills, Plovdiv is often referred to in Bulgaria as "The City of the Seven Hills".
Plovdiv is host to economic and cultural events such as the International Fair Plovdiv, the international theatrical festival "A stage on a crossroad", the TV festival "The golden chest". There are many remains preserved from Antiquity such as the Ancient amphitheatre, Roman Odeon, Roman Stadium, the archaeological complex Eirene and others.
Plovdiv has a humid continental climate with considerable humid subtropical influences. There are four distinct seasons during the year and large temperature jumps between seasons are common.
Summer (late May to mid-September) is hot, moderately dry and sunny with a July and August average of 31 °C (88 °F). Plovdiv sometimes experiences very hot days typical in the interior of the country. Summer nights are also mild.
Autumn starts in mid or late September; days are long and relatively warm in early autumn. However the nights become chilly by September. The first frost occurs on average by November.