The Baron Vladimir Harkonnen is a fictional character and the main antagonist from the Dune universe created by Frank Herbert. He is primarily featured in the 1965 novel Dune and is also a prominent character in the Prelude to Dune prequel trilogy (1999-2001) by Brian Herbert and Kevin J. Anderson. The character is brought back as a ghola in the Herbert/Anderson sequels which conclude the original series, Hunters of Dune (2006) and Sandworms of Dune (2007).

"Appendix IV: The Almanak en-Ashraf (Selected Excerpts of the Noble Houses)" in Dune says of him (in part):

VLADIMIR HARKONNEN (10,110-10,193) Commonly referred to as Baron Harkonnen, his title is officially Siridar (planetary governor) Baron. Vladimir Harkonnen is the direct-line male descendant of the Bashar Abulurd Harkonnen who was banished for cowardice after the Battle of Corrin. The return of House Harkonnen to power generally is ascribed to adroit manipulation of the whale fur market and later consolidation with melange wealth from Arrakis.

Vladimir (Russian: Влади́мир; IPA: [vlɐˈdʲimʲɪr]) is a city and the administrative center of Vladimir Oblast, Russia, located on the Klyazma River, 200 kilometers (120 mi) to the east of Moscow along the M7 motorway. Population: 345,598 (2010 Census preliminary results); 315,954 (2002 Census); 349,702 (1989 Census).

Vladimir was one of the medieval capitals of Russia, and two of its cathedrals are a World Heritage Site. It is served by the Semyazino Airport, and during the Cold War Vladimir was host to Dobrynskoye air base.

The area occupied by the city of Vladimir has been inhabited by humans (at least intermittently) for approximately 25,000 years (see Sungir). Traditionally, the founding date of Vladimir has been acknowledged as 1108, as the first mention of Vladimir in the Primary Chronicle appears under that year. This view attributes the founding of the city, and its name, to Vladimir Monomakh, who inherited the region as part of the Rostov-Suzdal Principality in 1093. In 1958, the 850th anniversary of the city foundation was celebrated, with many monuments from the celebrations adorning the city squares.