In this week's edition of the ArtTactic Podcast, Mark Rappolt, editor of ArtReview, joins us to discuss their recently released Art World Power 100 rankings for 2013. First, Mark reveals that Sheikha Al-Mayassa bint Hamad bin Khalifa Al-Thani, the head of the Qatar Museums Authority, own this year's top spot and explains why she is worthy of this ranking. From a broader perspective, Mark identifies the most noticeable power shift within the art world reflected in his rankings. Also, he touches on some of the notable new entrants to this year's list and details the increasing presence of non-US and European figures on the list.