The creation of the Romanian unitary national state and of a new legislative frame favourized the development of the commercial activity. A similar evolution was also noticed in Ploieşti, where the municipality became involved in organizing the markets and the unfolding of a civilized commerce. Thanks to the measures taken by Ploiesti Mayoralty, there took place the following: arranging the markets, moving the "cattle market" in Bariera Bucov, demolishing the Old Market, building the Central Market Places. This monumental and modern commercial spaceachieved according to the plans of the architect professor Toma T. Socolescu, was built between 1930-1935, during the mandated mayors Constantin Gh. Brezeanu, Ştefan D. Moţoiu, Gheorghe Manolescu şi Ion N. Predescu.at the same time the Mayoralty also issued orders to settle the commercial activity, fighting the speculation, supplying the population with food products and fuel. By involving in the commercial activity, Ploiesti municipality encouraged the economic evolution of the region and obtained important incomes used to achieve household and public utility works.