Belgrade, Serbia
Belgrade is the capital of the Republic of Serbia and is, as such, the country's largest city with a population of about 2 000 000 people. The city has a long history, dating back to before the common era, when it was settled by tribal people. Later on, it became the Roman city of Singidunum, and relics of that era can still be seen in the city, particularly at Kalemegdan Fortress. As it entered the Byzantine Empire, Belgrade saw many conflicts, including invasion by the Ottoman Empire, until Serbia finally became independent in the 1800s.