Brandenburg the Province of Brandenburg, again subdivided into the government regions of Frankfurt and Potsdam. In 1881, the City of Berlin was separated from the Province of Brandenburg. However, industrial towns ringing Berlin lay within Brandenburg, and the growth of the region's industrial economy brought an increase in the population of the province. The Province of Brandenburg had an area of and a population of 2.6 million (1925). After World War II, the Neumark, the part of Brandenburg east of the Oder–Neisse line, was transferred to Poland; and its native German population expelled. The remainder of the province became a state
City Gate (Valletta) and present city gate was constructed between 2011 and 2014 to designs of Renzo Piano. This gate is very different from the previous ones, as it consists of a breach in the bastions, flanked by large blocks of stone which are separated from the curtain walls by high blades of steel. Like the fourth gate, it was also built as part of a project to redesign the city entrance. The project also turned the ruins of the Royal Opera House into an open-air theatre known as "Pjazza Teatru Rjal", and a new Parliament House was built occupying part of Freedom