A bronze equestrian statue of Charlemagne, Emperor of the Holy Roman Empire, surrounded by Roland and Ogier's companions, stands on St. John Paul II's church square near Notre Dame Cathedral. As Voltaire later wrote: "The Holy Roman Empire was neither Holy, nor Roman, nor an empire." Let me remind you that Charles is the founder of the Carolingian Empire, whose dynasty was founded by his father Pepin the Short. Emperor Charles of the West himself was based at the Imperial Palace in Aachen and visited Paris only a couple of times. The monument to the sculptor Louis Roger was erected at the expense of his brother Charles in 1895, because after the defeat in the Franco-Prussian War, the Parisian authorities did not give money out of general disappointment at the defeat of France. The monument is beautiful, but according to historical descriptions, a powerful old man on a horse does not look very similar to the description of Charlemagne, except for his height. But the sculptor reflected in detail the clothes and weapons of that era.
The interesting fate of the sculpture itself: it's worth reading about it on the Internet. Composition and figures require detailed consideration and comprehension. That's just the location of the monument (next to Notre Dame de Paris) kind of puts it on the back burner. It's worth visiting and exploring!