Plovdiv once-bright greens and blues. Torah scrolls are kept in the gilded Aron-ha-Kodesh. The Plovdiv Drama Theatre is a successor of the first professional theatre group in Bulgaria founded in 1881. The Plovdiv Puppet Theatre, founded in 1948, remains one of the leading institutions in this genre. The Plovdiv Opera was established in 1953. Another pillar of Plovdiv's culture is the Philharmonic, founded in 1945. Soloists such as Dmitri Shostakovich, Sviatoslav Richter, Mstislav Rostropovich, Yuri Boukov, and Mincho Minchev have worked with the Plovdiv Philharmonic. The orchestra has toured in almost all of the European countries. The Trakiya Folklore Ensemble, founded
Plovdiv the year. Mists are common in the cooler months, especially along the banks of the Maritsa. On average there are 33 days with mist during the year. The history of Plovdiv spans more than eight millennia. Numerous nations have left their traces on the cultural layers of the city. The earliest signs of habitation on the territory of Plovdiv date as far back as the 6th millennium BCE. Plovdiv has settlement traces including necropolises dating from the Neolithic era, roughly 6000–5000 BCE, like the mounds Yasa Tepe 1 in Philipovo district and Yasa Tepe 2 in Lauta park. Archaeologists have