The Basilica of St. Andrew in Komárno is one of the dominant buildings in the town. It is located on Palatine Street, opposite the Danube Museum.
It was built by the Jesuits in 1748–1756. It collapsed in the earthquake of 1763, but in the following years was rebuilt according to the original plans. It was built in its present form in 1768 and 1771 in the Baroque style.
After the dissolution of the Jesuit order it came under the administration of the Benedictines. It suffered many fires and natural disasters. The great fire of 1848 almost completely destroyed it. It was restored in 1860 thanks to a public collection.
The sanctuary was elevated to a minor basilica in 2018.
It has excellent acoustics and an organ unique in the region, thanks to which musical and singing concerts are organised in it. The organ was made by Carl Friedrich.
The main altar was made by the Viennese master Karl Petrus in 1855–1860. The altar painting depicts St. Andrew.
Beneath the church is a large 3-storey crypt with about 500 burial places. Most of them are empty and have never been used.