The main entrance to the Upper Town today is the gate with the Sahat Tower. The clock tower was a recognisable detail in Turkish bazaars but it rarely appeared in fortresses, so this Belgrade tower can be considered an unusual example. It was built in the middle of the 18th century and is characterised by elements of the baroque — then the leading movement in European architecture.. In plans from the last decade of the 18th century, it is described as “a clock tower with a guard under it” and “a tall tower with a dome covered with tin in the German manner”.

The Belgrade Sahat Tower is 27.5 metres high, and the clock has a central mechanism and weights, as well as two gongs, and it can work for about a week between windings. The Sahat Tower as a whole has been preserved in its original form, but the clock mechanism was renewed in 2002 and now works on modern principles.

The famous Turkish travel writer from the 17th century, Evliya Cebelebi, noted that the bell of the Sahat Tower can be heard from a distance, even when the traveler is a day’s journey away across the Sava.