Kalemegdan is today the largest historical park and at the same time the most significant cultural and historical complex, dominated by the Belgrade fortress overlooking the mouth of the Sava River. The name Kalemegdan derives from Turkish word Kale which means fortress and Word Majdan signs that battleground.
After the battle of Angora (1402), Stefan Lazarevic, son of Prince Lazar, received from the Byzantine Emperor the title of Despot, and by Hungarian King Sigismund in Belgrade. That’s right, diplomatic way, in 1404 Belgrade first became the capital of the Serb state and its military economic and cultural offices, cliffs facing the Great War island and the mouth of the River Sava.
Belgrade is first saved by Turkish attacks in 1440 and a major campaign on Belgrade has taken sultan Mehmet II, the Conqueror of Constantinople in 1456. After a big fight on the rivers, which are specifically noted the Serbs name Sajkasi, and on land, Belgrade has managed to fight back and become a bulwark of Christianity.
During the third siege of Belgrade, in 1521 Sultan Suleiman the magnificent was able to walk, and Belgrade then became important Turkish foothold for their further breakthroughs toward the seat of Europe.
Of the many Turkish buildings in the Belgrade fortress to date has remained preserved fountain Mehmed Pasha Sokolovic bridge from the second half of the XVI century and the mausoleum of Damad Ali-Pasha from the 18TH century.
<a href="http://www.srbijazamlade.rs/novosti/usluge/snimanje-i-fotografisanje-iz-vazduha" target="_blank" rel="noopener">Source</a>