The 4th Congress of the World Conference on Constitutional Justice was held with the participation of about 90 member countries in Vilnius, Lithuania, between 11 - 14 September 2017. The topic of the Congress was the Rule of Law and Constitutional Justice in the Modern World. This theme was divided into four sub-topics: 1. the different concepts of the rule of law; 2. new challenges to the rule of law; 3. the law and the state; 4. the law and the individual.

12th meeting of the Bureau and second General Assembly of the World Conference on Constitutional Justice were also held during the Congress. The President of the Constitutional Court of Turkey Prof. Dr. Zühtü ARSLAN, Justice Mr. Celal Mümtaz AKINCI and Rapporteur Dr. Mücahit AYDIN participated in the Congress on behalf of Turkey.

An amendment to the Statute of the World Conference has been adopted by the General Assembly. Under the amended Statute, one representative from each four continent (Africa, Asia, America, and Europe) shall be elected for the Bureau term membership by the given continent. Countries that are members of constitutional justice conferences for two continents, such as Turkey, shall vote for the election of the representatives of both continents. In the Bureau meeting, Algeria has been elected as the term president of the World Conference on Constitutional Justice.

Throughout the Congress, the Turkish delegation held meetings and exchanged views with delegations from Africa, Asia, Europe and the Balkans.

In the Vilnius Communiqué adopted at the end of the Congress, the principle of the rule of law and the independence of courts were underlined, and all kinds of unconstitutional attempts to undermine the state of law were condemned.