The Swiss Guard are in charge of protecting the Vatican and my good friend Pope Pius Pug. Michelangelo designed their uniforms, but his fame persists in spite of this.

Near each of the fountains in St. Peter's Square ...
... is a specially marked spot. Stand here, and all of the columns of the colonades (they are four deep) are perfectly aligned.
Like this.

St. Peter's Square from the top of the dome. The obelisk was put there by one of my favorite emperors, Caligula.