https://www.bestshoe99.in/how-to-tie-shoelaces/
It is symmetrical, it looks beautiful, it takes about as much time to tie and it has exactly zero chance of untying itself.
It has never failed me since I learned it.
The Berluti knot traces back into European aristocracy.
Ian's secure knot neglects to tuck one of the loose ends - it's not as secure.
The Turquise Turtle Knot is described on page 357 and it is similar, but not the same as Berluti knot.