The cost of the post congress tour is 20 EUR. It includes the travel costs to Plovdiv, tour guide and a lunch in Plovdiv. The tour will take place on the 16.05 from 9:00 till 16:00. Plovdiv is the second-largest city in Bulgaria. Plovdiv's history spans some 6,000 years, with traces of a Neolithic settlement dating to roughly 4000 BC. 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 high. Because of these seven hills, Plovdiv is often referred to in Bulgaria as "The City of the Seven Hills". Plovdiv is a picturesque town, with many parks and gardens, museums and archaeological monuments. One of Europe's oldest cities, Plovdiv is rich in history.Originally a Thracian settlement it was an important centre in antiquity under the Greeks and Romans. In the middle ages it maintained its regional importance under Ottoman rule and later in the Bulgarian Empire. A testament to Plovdiv's importance in antiquity is the Roman Amphitheatre, one of Bulgaria's most famous Roman monuments, and the remains of a Roman Stadium both of which are open to the public. Many cultural events are still held in the Roman Amphitheatre, notably the Verdi Festival and the international folklore festival. At the heart of the city is "Old Plovdiv" the original renaissance town which has been carefully preserved as an open air museum with over 150 architectural monuments. Most of the buildings date back to the National Revival Period of the 19th century with beautiful facades looking onto steep, narrow cobbled streets. Old Plovdiv is truly picturesque with many of the more important buildings, predominantly Baroque in style now converted into museums, galleries and traditional taverne.