These fragrances feature prominent citrus notes including bergamot, lemon, orange, mandarin, tangerine, etc. Essential oils are obtained from the peels of the citrus fruits through expression. Fragrances in the citrus family often make use of other products obtained from the orange tree such as neroli and orange blossom absolute. The citrus family is one of the earliest fragrance families. The progenitors of the family, the Eau de Colognes or Kölnisch Wassers, were first developed in the early 1700s.