Christian Dior SE (known as "Dior") is a French luxury fashion brand founded in 1946 by Christian Dior. The brand is known for its high-end clothing, accessories, and fragrances, as well as its iconic couture dresses and suits.
Dior logotype probably uses Nicolas Cochin Regular designed by Georges Peignot. The typeface was inspired by the copperplate engravings of 18th-century French artist Charles-Nicolas Cochin. The font is a commercial one and you can buy it here.