The Constitutional Court maintains close cooperative ties with the Commission of the Council of Europe for Democracy through Law (Venice Commission) which is an advisory institution of the Council of Europe on constitutionalism issues. The Constitutional Court makes use of the CODICES InfoBase on constitutional case-law, which was created and is maintained by this Commission. This InfoBase contains the most significant decisions of the constitutional justice institutions of many states and their summaries in English and French; the most important rulings, decisions, and conclusions of the Constitutional Court and their summaries are also sent to this InfoBase. The Constitutional Court also has the possibility of engaging in sharing experience in the Venice Forum, i.e. asking, through the Venice Commission, the representatives of the constitutional justice institutions of other states the questions that are material in deciding concrete constitutional justice cases, as well as providing, in its turn, answers to their enquiries.
In 2014, Gediminas Mesonis, a Justice of the Constitutional Court, was appointed as an individual member—independent expert—(permanent member) of the Venice Commission representing Lithuania for a four-year period.