The Basilica of Saint Nicholas is the largest and most historically significant church in Trnava, a Gothic hall church whose origins date to the 13th century. The exterior reads as a fortress-like mass of grey stone, while the interior opens into something grander: vaulted ceilings, baroque side chapels added from the 17th century onwards, and an impressive high altar.
The basilica sits on the eastern edge of the old town and was elevated to basilica status in 1990. It is the mother church of the Archdiocese of Trnava and remains an active place of worship. Entry is free outside services, and the interior is worth an unhurried visit — the contrast between the Gothic structure and the exuberant baroque furnishings tells the story of the city's fortunes across several centuries.