This research focused on the interactions between the provisions, institutions and practices of the WTO Agreement and UNESCO CDCE on trade in cultural goods. It examines potential conflicts between the two agreements including incoherence between their dispute resolution mechanisms. It proposes three routes to enhance legal coherence between the rules of the WTO Agreement and the UNESCO CDCE: Improved Interpretation, Harmonization through Hard law, and Mutual Supportiveness through Soft law. This thesis has found and illustrated several feasible solutions, with various levels of utility and practicability, for the problem of fragmentation between the WTO's rules for the international trading regime, and specific UNESCO rules that States have adopted to enhance cultural diversity. In conclusion, the Mutual Supportiveness through Soft is the best route for stability and legitimacy of the international legal order and enhance coherence between the WTO Agreement and the UNESCO CDCE.