Here, you can walk on wooden planks to study the upper structure of the domes and the old clock mechanism. The most interesting item in the semi-dark exhibition space is the miniature model representing the original round church designed by Mihály Péchy. Although the design won the tender, it was never built because of a lack of funds. The present design was created at a later time. Once you get to the other tower, you can climb the stairs leading to the great bell, the predecessor of which was gifted to the church in 1640 by a famous Hungarian lord, but which had to be re-cast after the great fire of 1802.
Several steps up, you will find a small lookout on the top floor of the west tower. Looking through the windows to the four cardinal points, you will see the loosely arranged panorama of the ‘Calvinist Rome’.