Two Truths and a Lie
Two of these are true. One we made up. Tap the lie.
The first mention of Belgrade's name in its current form is from a letter written on 16 April 878 by Pope John VIII.
Belgrade's Kalemegdan fortress was built entirely by the Ottomans in the 1500s, with no earlier Roman or Celtic structures.
Belgrade has changed its name 15 times through history, including Singidunum, Alba Graeca and Prinz Eugen Stadt.