The Cathedral of Saints Peter and Paul is not only the main Catholic church in the city of Šiauliai, but also one of the most significant Renaissance architectural monuments that Lithuania takes pride in. The snow-white building with its 70-meter octagonal tower dominates the cityscape, serving as its recognizable symbol and the spiritual center of the region.

One of the cathedral's unique features is its architectural appearance, which combines defensive construction traits with elegant Mannerism. When examining the facade, look for the bay towers, typical of late medieval fortified churches, and the double windows that give the building its distinct rhythm. On the south wall of the church, you'll find an ancient sundial — one of the few surviving objects of its kind in the country.
Inside, the cathedral impresses with its austere yet grand space featuring high barrel vaults. Despite numerous reconstructions, the church has maintained its integrity and exceptional acoustics. Today, it is an active cathedral of the diocese, where history is closely intertwined with the present, attracting pilgrims and tourists from all over the world with its tranquility and monumental beauty.