HE Milan Milanović, Head of the United Nations Department at the Ministry of Foreign Affairs of the Republic of Serbia, held an online lecture organized by the Centre for International Organizations and International Law of the Institute of International Politics and Economics. The meeting was opened by Prof. Branislav Đorđević, Director of the Institute of International Politics and Economics. The topic of the lecture was “Multilateral diplomacy at the United Nations headquarters”. During the lecture, Mr Milanović approached the way the UN functions and pointed out the main challenges that the diplomat faces through examples and anecdotes gained during his extraordinary diplomatic career. The lecture was followed by a short discussion.