The scale of the Basilica
With its staggering dimensions and finishing touches by Bernini, the facade of St. Peter’s Basilica represents a perfect combination of harmony and majesty. Perhaps its greatest aspect is the cupola by Michelangelo. In the past, it could be seen for dozens of kilometers in any direction. The dimensions are such that various people could sit comfortably on top of the ball which tops the dome. You can actually go up and visit the dome but the lines are rather long and you have to pay. The views, though, are worth it.
St. Peter’s Basilica wasn't built on a human scale, but rather a divine one.