Zemun (Belgrade), Faculty of Geography, (M. Tadić, A. Petrović, 2013)
(44° 51′ 18″ N, 20° 22′ 52″ E)
Fig. 1. Students during the construction: the part of the Mathematical Geography course
Fig. 3. Group photo after a successful exercise
Fig. 4. The sundials distribution on the territory of Serbia (2015)