The final reconstruction works of the Crown Tribunal building were conducted between 1781-1787 by Dominik Merlini, an architect in ordinary of King of Poland - Stanisław August Poniatowski. The building has then become a Classicist structure. Following the extension of the whole building, the second floor was finished. The original total area of the Crown Tribunal was doubled. Currently, the building is the seat of the Registrar’s Office. Today, concerts of chamber music, lectures and formal meetings take place in the former Tribunal Court room.