Šv. Kryžiaus Atradimo bažnyčios vidus. Klaudijaus Driskiaus fotografijaThe interior of the church has preserved authentic forms of the late Baroque. Inside the church the central nave stands out according its height and wide and it passes on to the same height presbytery, which ends in semicircular apse. A pair of pillars, united by an arch, divides the central part from narrower and lower aisles. The transept is formed by small chapels built in the aisles. Six Baroque altars, made from the artificial multicoloured marble, pulpit, baptistry and organ make the united ensemble of the interior. The architectural forms of altars are plastic; they are embellished by stucco sculptures and decorative mouldings. Designed with a lot of delicate decoration, the pulpit and baptistry are especially original and are united into rococo composition. 

From the very beginning the Brotherhood of the Rosary, which Dominicans took care of, was based at the church. Brotherhood took care of one of side altar (The 17th century picture of St Virgin Mary of the Rosary has survived in the church). The other altars were devoted for the honour of the popular Dominican saints: St Dominic, St Hyacinth (Jackus), St Vincent Ferrer and famous Franciscan preacher St Anthony of Padua. For The Passion of Christ was devoted not only the main altar but the altar of Thoughtful Jesus as well. As the time passed, the titles of altars were changing, but the architectural structure has left. Besides the other valuable examples of art and history, the portraits of benefactors Piotrowski should be mentioned. Their portraits are still hanging above the organ balcony in the church. In the sacristy of the church there are the 18th century decorations in stucco: the figure scenes from the Bible, ornaments of plants, symbolic episodes reflecting the Passion of Christ, sacrifice and Redemption.

Šv. Kryžiaus Atradimo bažnyčios vidus. Iš parapijos archyvų Sakykla. Klaudijaus Driskiaus fotografija Krikštykla. Arnoldo Stasiulio fotografija