[1] The church dedicated to Saint Nicolas, patron of merchants, is located at the highest point of the historical town centre, where the former medieval marketplace stood, not far from the city walls.
The architecturally homogeneous Gothic basilica type temple, whose nave is nearby twice as high as the aisles, bears marks of the Danube style.
The largest Gothic window, adorned with rich traceries and stained glass, is at the church front,[3] and depicts Saint Cecilia.
In 1739, Bishop Imrich Esterházy added an octagon chapel to the northern side of the church; it contains the painting known as the "Merciful Virgin Mary of Trnava".
[1] Romanian-Hungarian humanist and scholar Nicolaus Olahus (Nicholas, the Vlach) and Croatian cardinal, diplomat and writer Antun Vrančić are buried in the church.