Originally this knot is called the Ediety, just for fun, I am going to pretend it was invented by a Frenchman but don't quote me on that. It gained momentum when it was seen in the Matrix 2 being donned by the always-posh Merovingian, which is the name I prefer. Here is the Merovingian or Ediety knot tied using a contrast Edietty tie provided by edietty.com.
This knot is very special, it looks as if your tie is actually wearing a little miniature tie! It will turn heads. It isn't all flowers and rainbows however. This knot needs more prep than most. You need to hide how the tie ends when wearing the Merovingian knot. Be it with a vest, cardigan, blazer, sport coat, or suit, you need to cover it up! The knot is important to show, the ends are important to hide. If you like this knot, make sure to check out the rest!
Like many other knots, it doesn't work well with all ties. Ideally, you want to use a contrast tie for this (edietty.com), it creates a very interesting look that will make people scratch their heads. A striped tie might look confusing and shocking. As always a plain, basic, single-color tie will look great.