On Monday, the 16th of December 2019, there was a scientific conference at the University of Belgrade Faculty of Law, dedicated to the 150th anniversary of the 1869 Constitution of Serbia. This conference marks the creation of the most long-standing Constitution of the Principality and Kingdom of Serbia. The gathering was opened by appropriate speaches from Dr Dragoljub Popović, who has been the professor of legal history at our faculty for many years, and by Prof. Dr Zoran Mirković, the Dean. The conference was divided into two sessions. The first session delved into the historic circumstances surrounding the adoption of the Constitution in 1869, with a great contribution from the colleagues from the Department of History of the University of Belgrade Faculty of Philosophy; the session was also dedicated to the first provisions Constitution. Within this session we listened to the presentations by Prof. Dr Suzana Rajić, Ass. Prof. Dr Danko Leovac, Ass. Prof. Dr Nina Kršljanin, and research assistant MA Danijel Radović. The second session was mostly dedicated to the way contemporaries viewed the 1869 Constitution. Within this session we had presentations by Prof. Dr Zoran Mirković, Ass. Prof. Dr Dalibor Đukić, and Ass. Dr Uroš Stanković. Both sessions closed with interesting discussions, allowing colleagues who deal with different aspects of Serbian history to exchange views, information and results of their research.