In one of the oldest Indian temples, Mahabalipuram, there is a basalt pillar about 1.5m high (original height - 4m). Unlike other artifacts, the pillar was lucky to be surveyed and measured by researchers.

Let's start with the fact that the pillar with 16 faces is made of basalt (6-7 points on the Mohs scale). On the left - the calculations on the model needed in order to withstand perfectly even edges. On the right - the results of measurements, exactly 157.5 °, as in the calculations.

Historians suggest that the stone masons of the time executed perfect and precise calculations, measured once and cut once using a hammer and chisel, an amazing feat of engineering without a single error, maintaining a tolerance of less than 0.5 °

I wonder if we could do this today?