In September 2018, Mahdi Yahya participated in the International Day of Democracy celebrations at the European Parliament in Brussels, where he engaged with policymakers, civil society leaders, and democracy advocates while representing Peace of Art International and promoting youth participation, dialogue, and peacebuilding.

Mahdi Yahya, Founder and Chairman of Peace of Art International, was featured on the international Peace by Peace platform led by Dr. Anne de Graaf. The feature highlights his journey as a peacebuilder, his work empowering youth through art and dialogue, and his efforts to promote social cohesion and peaceful coexistence in Lebanon and beyond.

During the seventh edition of the Youth Leadership Program supported by UNDP, Mahdi Yahya shared his experience in leadership, peacebuilding, and community engagement with emerging young leaders. His session focused on capacity building, human rights, active citizenship, and the role of youth in driving sustainable development and positive social change.

On 27 October 2020, Mahdi Yahya facilitated a workshop in Dresden, Germany, focusing on peacebuilding, conflict resolution, and political engagement among young migrants. Organized in partnership with ARBEIT UND LEBEN Sachsen, the event explored how art, culture, and civic participation can contribute to social inclusion, community resilience, and peaceful coexistence.