led by Husein Gradaščević. Today, a major city street is named Zmaj od Bosne (Dragon of Bosnia) in his honor. The rebellion failed and for several more decades, the Ottoman state remained in control of Bosnia. The Ottoman Empire made Sarajevo an important administrative centre by 1850. Baščaršija became the central commercial district and cultural center of the city in the 15th century when Isa-Beg Ishaković founded the town. The toponym Baščaršija derives from the Turkish language. Austria-Hungary 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. The Austro-Hungarian period was one of great development for the city, as the Western power brought its new acquisition up to the standards of the Victorian age. Various factories and other buildings were built at this time, and a large number of institutions were both Westernized and modernized. For the first time in history, Sarajevo's population began writing in Latin script. For the first time in centuries, the city significantly expanded outside its traditional borders. Much of the city's contemporary central municipality (Centar) was constructed during this period. Architecture in Sarajevo quickly developed into a wide range of styles and buildings. The Sacred Heart Cathedral, for example, was constructed using elements of neo-gothic and Romanesque architecture. The National Museum, Sarajevo brewery, and City Hall were also constructed during this period. Additionally, Austrian officials made Sarajevo the first city in this part of Europe to have a tramway. Although the Bosnia Vilayet de jure remained part of the Ottoman Empire, it was de facto governed as an integral part of Austria-Hungary with the Ottomans having no say in its day-to-day governance. This lasted until 1908 when the territory was formally annexed and turned into a condominium, jointly