History of Plovdiv since 1886), supported by the Greek state and nationalistic organizations, was also the forum of the Greek communities of the wider region. The city was captured from the Ottomans during the Battle of Philippopolis in 1878. According to the Treaty of San Stefano on 3 March 1878 the Principality of Bulgaria included the lands with predominantly Bulgarian population. Plovdiv was selected as a capital of the restored country and as a seat of the Temporary Russian Government. Great Britain and Austria-Hungary, however, did not approve that treaty and the final result of the war was concluded in the Congress of
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