104 avenue des Champs-Elysées
75008 Paris
Display phone number 01 83 79 09 79
Georgios Petrochilos
Todd Wetmore
Kathryn Khamsi
Simon Elliot
Carmen Martinez Lopez
Constantine Partasides Qc
Manish Aggarwal
Gaëtan Verhoosel
Scott Vesel
Reza Mohtashami
Jan Paulsson
Luke Sobota
Liz Snodgrass


Three Crowns was founded by specialist international arbitration advocates in the belief that international disputes call for focused advice and advocacy.

Located in London, Paris and Washington DC, Three Crowns is a firm dedicated to international arbitration—commercial, investment-treaty, and inter-State.

Our lawyers bring extensive experience in all types and fora of international arbitration, having represented corporate and sovereign clients in many of the most significant arbitral cases of the past decades. This collective expertise will be brought to bear with substantial, direct, and continuous partner involvement in each matter handled by the firm.

Our experience includes many of the most important arbitration disputes in recent times. We have acted on global disputes for corporates and sovereigns, and have been at the forefront of ground-breaking awards that have set international precedent. Our specialist team have extensive experience in advising on commercial, investment treaty, and inter-State disputes.

We provide strategic advice in the pre-arbitration stages of a dispute, and we deliver the lead advocacy when the dispute does ripen into an arbitration. This experience ensures our clients are served with a deep-rooted understanding of the arbitral system which matches their business needs in any sector or industry. Our experience and understanding of international legal matters ensures we are able to deliver assistance to selected pro bono causes.


  • International commercial arbitration

  • Investment treaty arbitration

  • Inter-state disputes advice and arbitration

  • Cause-based (pro bono)