title: Geheimrat Dr. Oldenburg
text: # Geheimrat Dr. Oldenburg
  
  'Geheimrat Dr. Oldenburg' is a German apple cultivar. It was created in 1897 at the Höheren Lehranstalt für Obstbau of Geisenheim in the Rheingau by hybridisation of Minister von Hammerstein [de] and Baumanns Renette [de]. It may also be known as 'Geheimrat Doktor Oldenburg', 'Geheimrat Oldenburg', or simply 'Oldenburg'. It is a quite different apple from the older Russian cultivar 'Duchess of Oldenburg', also sometimes known simply as 'Oldenburg'.
  
  ## Hybrids
  
  Cultivars that descend from Geheimrat Dr. Oldenburg include: Alkmene (Geheimrat Dr. Oldenburg × Cox's Orange Pippin); Apollo (Cox's Orange Pippin × Geheimrat Dr. Oldenburg); Clivia (Geheimrat Dr. Oldenburg × Cox's Orange $Pippin);^{:539};$ Elektra (Cox's Orange Pippin x Geheimrat Doktor Oldenburg); Roba (Geheimrat Dr. Oldenburg x unknown); and possibly Dukat (Geheimrat Dr. Oldenburg × Cox's Orange $Pippin).^{:538}$
  
  