In this week's episode of the ArtTactic Podcast, we're joined by Pierre Valentin, partner at Constantine Cannon and also founder and chair of International Catalogue Raisonné Association. First, Pierre tells us what exactly a catalogue raisonné is. Then, he identifies some of the most common ways they are used by different market participants. Also, Pierre reveals how catalogue raisonnés have evolved in the past year fews. Lastly, Pierre offers advice to living artists to ensure they will be able to more easily create a catalogue raisonné of their work later in their career.