Austria-Hungary's occupation of Bosnia and Herzegovina came in 1878 as part of the Treaty of Berlin, and complete annexation followed in 1908, angering the Serbs. Sarajevo was industrialized by Austria-Hungary, who used the city as a testing area for new inventions such as tramways, which were established in 1885 before they were later installed in Vienna. Architects and engineers wanting to help rebuild Sarajevo as a modern European capital rushed to the city. A fire that burned down a large part of the central city area (''čaršija'') left more room for redevelopment. As a result, the city has a unique blend of the remaining Ottoman city market and contemporary western architecture. Sarajevo also has some examples of Secession- and Pseudo-Moorish styles that date from this period.