Saint Basilica Trinity is a Romanesque building from the turn of the twelfth and thirteenth centuries. The temple has about 300 unique movable monuments. These include numerous altars, including the reliquary altar of the Holy Cross with a Gothic figure of the Crucified Christ, dated around 1361. It is also worth paying attention to the Altar of the State Library and visiting the museum treasury.
Particularly valuable and interesting in this church are two Romanesque columns depicting human virtues and defects. Similar works can be seen only in Spain in Santiago de Compostella, in the cathedral. St. James and in Venice, in the cathedral. St. Mark.
The basilica was consecrated in 1216, built on the Latin cross plan. The presbytery ended with an apse with two longitudinal chapels on the sides, they are: the chapel of St. Barbara and the chapel of the Heart of God. The basilica was rebuilt several times.