1991

• 9 July 1991
  Admission of the University of Oldenburg to the German Research Foundation (DFG).
• 3 October 1991
  Official ceremony to name the university after Carl von Ossietzky with Minister President Gerhard Schröder, who apologises to Ossietzky's daughter for the inappropriate behaviour of the state government in naming the university. The Lower Saxony state parliament had previously cleared the way for the naming by amending the law.
  
  Official naming ceremony:
  Gerhard Schröder with Rosalinde von Ossietzky-Palm, Carl von Ossietzky's daughter

1992

• 29 January 1992
  Opening of the Oldenburg Research and Development Institute for Information Technology Tools and Systems (OFFIS) initiated by Prof. Dr Volker Claus and Prof. Dr Hans-Jürgen Appelrath.
• 1 October 1992
  Prof. Dr Joachim Luther, founder of Oldenburg's energy research, becomes Director of the Fraunhofer Institute for Solar Energy Systems. His successor in Oldenburg is Prof Dr Jürgen Parisi.

1993

• 6 October 1993
  Admission by the University Senate to participate in the Lower Saxony pilot project to test a global budget, which gives the universities greater freedom to shape their own budgets.

1994

• 8 October 1994
  Rowohlt Verlag presents the Oldenburg complete edition of Carl von Ossietzky's writings at the Frankfurt Book Fair.

1995

• 10 February 1995
  First New Year's reception of the University and the University Society at the Oldenburg State Theatre.
• 21 June 1995
  Inauguration of the OFFIS building on Escherweg, which becomes the nucleus of the new IT quarter on the "Alte Fleiwa" site.
  
  
• 30 October 1995
  UNESCO declares the Karl Jaspers Lectures on Contemporary Issues to be the German contribution to the World Decade for Cultural Development.
• 29 November 1995
  The DFG approves the first Collaborative Research Centre (SFB) for the University of Oldenburg, "Neural Foundations of Cognitive Performance", in which the University of Bremen is also involved. Prof Dr Reto Weiler is temporary spokesperson for the SFB.

1996

• 8 February 1996
  Foundation of the Hörzentrum Oldenburg GmbH as a limited company and as an affiliated Institute of the University.
  
  The Haus des Hörens in Oldenburg

1997

• 13 October 1997
  Opening of the Hanse-Wissenschaftskolleg (HWK) in Delmenhorst as a joint institution of the Universities of Oldenburg and Bremen.
  
  Research centre for renowned scientists from all over the world: the HWK
• 21 November 1997
  Signing of the contract for the first endowed professorship, a professorship in business informatics financed by the regional economy.

1998

• 27 April 1998
  Opening of the lecture hall centre on the Haarentor campus with Federal Research Minister Dr Jürgen Rüttgers.
  
  Lecture hall centre at night
• 15 July 1998
  First award of the prize for good teaching.
• 1 October 1998
  Prof. Dr Siegfried Grubitzsch takes over the office of President as successor to Prof. Dr Michael Daxner.

1999

• 3 February 1999
  Foundation of the "Laboratory for Thermophysical Properties" (LTP) initiated by Prof. Dr Jürgen Gmehling, which becomes an Institute of the University of Oldenburg.
• 1 July 1999
  Foundation of the Hannah Arendt Research Centre under the direction of Prof. Dr Antonia Grunenberg
  
  Visit by Richard von Weizsäcker to the Hannah Ahrendt Research Centre with President Siegfried Grubitzsch (l.) and Antonia Grunenberg (r.)

2000

• 28 April 2000
  Establishment of the interdisciplinary Neurosensory Science Centre, in which scientists from the fields of biology, physics, psychology and computing science work together.
• 20 September 2000
  The University Senate decides to establish the "Centre for Interdisciplinary Women's and Gender Studies" (ZFG).