# Despot Stefan Tower, Belgrade Fortress

- **Country:** Serbia
- **Coordinates:** 44.825278, 20.451111
- **Condition:** Under restoration
- **Year Built:** ca. 1405
- **Castle Type:** Castle
- **Location Text:** Stari Grad

The Despot Stefan Tower, also known as the Dizdar Tower, is a historic stone structure located within the Upper City of the Kalemegdan Fortress in Belgrade, Serbia. Constructed around 1405 by Despot Stefan Lazarević, the tower was erected shortly after Belgrade became the capital of the Serbian Despotate. As a significant remnant of the Lazarević dynasty, the building represents an important piece of medieval military architecture from the early 15th century. Its strategic placement within the fortress complex highlights its original role in the defense and administration of the city during a pivotal era in Serbian history.

In the modern era, the tower has undergone a unique transformation from a military installation to a center for scientific observation. In May 1963, city officials and astronomical societies agreed to adapt the structure into an observatory, a project that was completed later that year. Today, the tower serves as the headquarters for the Astronomical Society Ruđer Bošković and houses its Popular Observatory. The facility is equipped with specialized instruments, including a Zeiss refractor and a Tall reflector telescope, which are primarily used for nighttime celestial observations. Additionally, four panoramic telescopes are mounted on the tower, allowing visitors to view the expansive panorama of Belgrade during the day.

The site remains open to the public, offering a blend of historical heritage and educational opportunity. While the tower retains its ancient stone construction, its current condition reflects its active use as a functional observatory rather than a static museum piece. This dual identity preserves the architectural legacy of the Serbian Despotate while providing a unique vantage point for both astronomy enthusiasts and tourists interested in the city's landscape. The adaptation of the tower ensures its continued relevance and maintenance within the cultural fabric of Belgrade.

![Photo of Despot Stefan Tower, Belgrade Fortress](https://upload.wikimedia.org/wikipedia/commons/c/c4/Despotova_kula6.jpg)

**Source:** https://en.wikipedia.org/wiki/Despot_Stefan_Tower (Wikipedia, CC BY-SA)