These three photos were taken with different lenses from Vasilyevsky Island across the Neva River.
This is St. Isaac's Cathedral. In my opinion, this is the most grandiose building in St. Petersburg.
According to the legend of historians, it was initially wooden, rebuilt several times... I don't really trust historians and I'm not entirely sure that it used to be a purely cult/religious building.
From an engineering point of view, a building can be considered as a generator or receiver of energy. What kind of energy? The one that Tesla was interested in. One that does not require wires to transmit over distances. But I may be mistaken :)
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