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Much of the geometric knowledge imparted in our school days was grounded in the realm of Euclidean axioms. Yet, such knowledge proves inadequate for comprehending the full spectrum of laws and structures governing nature. Non-Euclidean geometry emerges as an indispensable tool when grappling with the intricacies of unique curved surfaces. In 1823, János Bolyai, an outstanding student at the Reformed College of Marosvásárhely (Târgu Mureș) in Transylvania, unveiled this innovative form of geometry. His groundbreaking contribution not only liberated the erstwhile axiomatic Euclidean world, ushering in fresh possibilities, but also elevated the realm of universal scientific thought to unprecedented heights.

The communion cup of the Reformed parish of Érkeserű (Cheșereu, Romania) was originally a plate, which was melted down at the beginning of the 19th century and made into a chalice. Its history, which can be traced back to the last third of the 16 th century, is closely linked to the history of the parish and the local landowning families, especially the Suselith-Horváth family. This study corrects and supplements earlier literature by using archival sources and source publications. It shows who were the original owners of the silver chalice, how it came to the later donor and the social background of the donation. It describes the relationship of the family members with the Reformed Church.

Numerous debates are evoked nowadays based on the disability of establishing an interdisciplinary harmony between Christian thought and exact sciences. It may therefore be necessary to review the main fields of the human intellect, thus sciences, philosophies, arts, religions, and Christian theology. The present study provides an overview of these areas focused on their subjects, methods and views, aiming to clarify its title.