Alternative Dispute Resolution Services

on 2nd July 2018 in


Court proceedings can be very expensive, consume much valuable time, generate harmful publicity, destroy goodwill and relationships between the parties and, in the end, satisfy none of the parties. There is often a clear incentive and, in many cases, an obligation on the parties to a dispute to consider and actively engage in alternative dispute resolution (ADR), primarily by way of mediation.

About the Authors

Gregor Kleinknecht is a German Rechtsanwalt and English Solicitor and a partner at Hunters Solicitors in London, specialising in art & cultural heritage law.  Gregor qualified as a German Rechtsanwalt in 1995 and as an English solicitor in 1996.  Following a career at two leading international City of London law firms and at a US law firm, Gregor founded and led the award-winning boutique firm of Klein Solicitors in Mayfair.  Gregor joined Hunters as a Partner in the Dispute Resolution and Business Services departments upon the merger of the two firms in February 2014.

Gregor conducts both transactional and dispute resolution work for a wide range of national and international artists, collectors, galleries, dealers, art consultants, funding organisations and landed estates.  Gregor also advises and has successfully acted for claimants in Holocaust restitution claims.  He is also a mediator and arbitrator with ArtResolve, the dedicated dispute resolution service for art and cultural heritage claims.  Gregor is a founding member of PAIAM.

The Legal 500 describes Gregor as a "tough litigator", and a "standout partner and litigation specialist" in art & cultural property, and recognises that he "has a great eye for detail and is very hardworking".  The Chambers directory recognises Gregor as "one of the few I would think of as being an art market specialist", and for his “enormous skill with art law, and his ability to handle difficult art legal issues with immense pressure and skill. He explains confusing or tricky situations very clearly and acts decisively and firmly on the client's behalf".

View Gregor Kleinknecht's profile

Petra works on a wide range of contentious and non-contentious matters relating to the art and antiques market, acting on behalf of private collectors, artists, dealers, organisations and trustees. Her dispute resolution work often involves issues of title, history, provenance or authenticity of works of art and cultural property. The transactional matters include advising on the acquisition and sale of collections, advising on import and export matters and the cross-border movement of art and drafting commissioning agreements, consignment agreements, loan agreements and terms and conditions of business. Petra also advises in relation to intellectual property law matters, including copyright, moral rights, artist's resale right, design law and trade mark law. Petra is a mediator accredited with ADR Group.


Petra completed her LLM at the London School of Economics and Political Science with a focus on art and cultural heritage law and intellectual property. Before pursuing a legal career, Petra graduated with a BA in History of Art from Bryn Mawr College in Pennsylvania, United States, and an MA from the Courtauld Institute of Art, London, and held research, collection management and business roles at museums, galleries and auction houses in the United States and London.


Petra has published papers on a wide array of art law topics such as consumer protection in art transactions and the UK's export licence regime in journals and publications, including Art Antiquity and Law.

View Petra Warrington's profile