he deep water port in 1903 were important stages of this boom and led to the rapid industrialization of the city. In the period after 151 factories were founded. Among them were the Sugar refinery founded by Avram Chaliovski, the Great Bulgarian Millsof Ivan Chadzipetrov and the oil and soap factory Kambana. In 1900 the mineral springs by the ancient Aquae Calidae were included in the urban area. In 1903, the new building of the Burgas Central railway station opened.
Founded in 1924 in Burgas Deweko (now HemusMark AD) was the first pencil factory in Southeastern Europe and became in 1937 official supplier of the Bulgarian Monarchy. 1925 opened in Burgas a specialized high school for mechanics and technologies. The following year, a large covered market was opened. Because of the cold wave in winter 1928/29 the Black Sea iced in late January and early February, so that the island of Sveta Anastasia could be reached on foot. 1934, Burgas already had 34 260 inhabitants.
Communism
During World War II on 9 September 1944 Red Army troops occupied the city and soon the whole country. In the following People's Courts, especially members of the wealthy families of the intelligentsia and members of the Bar Association were convicted. The two Chambers of the People's Courts met in Burgas in the former building of the Chamber of Commerce and Industry of Burgas (now the seat of the Governor of the Province Burgas).
After the Communists took power in 1945, the German and Italian School and the People's University was closed and over 160 factories and businesses (including the large companies Great Bulgarian Mills, Veriga, Plug, Dab, etc.), shops, baths and other private property was nationalized. The Nationalization and inability to lead by the new Rulers led the companies to the collapse of the food supply and the shortage of goods of daily life in the city. The total Nationalization inhibited the economic development in the city for decades
