Beograd (Hadži-Prodanova, 5), 14th Belgrade Gymnasium
(Designed by professor Ratomir Veselinović with his students; calculation by M. Tadić)
(44° 48′ 12″ N, 20° 28′ 31″ E)
Figure 2. The end of the shadow moved in hyperbole for the summer solstice and silently announced the astronomical beginning of summer.
Figure 3. Info-board showing “what’s what” on the sundial. The bar code allows students to get additional explanations on their mobile phone.