St. Nicholas Co-Cathedral is one of the oldest churches in Slovakia. It dates back to the 14th century and was originally a single-naved structure, but has now been expanded into a three-nave building with an elevated polygonal sanctuary. It is a Late Gothic cathedral that was completed in 1515, with the participation of master stonemasons Nicholas and Michael under the guidance of Prešov builder J. Brengiszer. Currently, there is an ongoing reconstruction of both the interior and exterior of the co-cathedral.

The main highlight of the co-cathedral is the Baroque main altar, which features an original Gothic shrine with three niches and neutral golden background, adorned with three sculptures. It is attributed to the Prešov woodcarver Ján Weiss. There are also two Late Gothic sculptures of adoring angels, created by the renowned sculptor Master Paul of Levoča. An interesting feature is the sundial located on the buttresses of the co-cathedral.

Visitors have access not only to the co-cathedral itself, primarily used for Masses, but also to the 71-meter-high tower, offering a magnificent view of the entire city of Prešov. The tower is open every day during the summer season.