The transition to realism was also gradual and slow. Painting of nature and common folk were not only easily accepted and the painters had even more difficulties when they tried to introduce new elements into church art. Djordje Krstić with his thematic and artistic solutions for the iconostasis in the Holy Trinity Cathedral Church in Niš gave the reason for an open struggle with the earlier beliefs. Others followed suit, including Živko Jugović, Svetislav Jovanović, Uroš Predić and Paja Jovanović, just to name a few. It is interesting to note that "with the realist disappears the long prevalence of Vojvodina in art and that Belgrade becomes not only the political but also the cultural and artistic center" so writes critic Dejan Medaković.