International trade has been a key area in the trade policy of major countries for decades. The WTO Agreements have represented an enlargement of issues under the multilateral rules to include trade in services, intellectual property, specific rules for subsidies, safeguards, antidumping, agriculture, technical barriers to trade, sanitary and phytosanitary measures, custom valuation, rules of origin amongst others. Recently, the WTO Members have also adopted the Trade Facilitation Agreement, which is a landmark in providing intelligent custom services and information to exporters and importers. In addition to all this changes, the WTO Agreements have also established an enhanced Dispute Settlement mechanism, which is relevant to settle dispute between WTO Members.The WTO has also become a champion in the defence of a freer international trade, advocating for including gender issues and small- and medium-sized enterprises into international trade concerns. This course aims at addressing the landscape of multilateral trade rules, especially directed to Portuguese speaking audience, who represents over 200 million native speakers across the world. Therefore, this course was made to disseminate the knowledge on the Multilateral Trading System for the Portuguese speaking audience.