Mežmuiža Church

The Red Synagogue (Great Beit Midrash) in Joniškis is an Ashkenazi synagogue built in brick in 1911. In the Soviet period the Red Synagogue was used for storage and later converted into a foundry with an apartment in the women's section. In the 1970s the former synagogue housed a youth club. The building's plan was altered; nevertheless, the façades remained almost unchanged, and the Torah ark and the details of interior painting were still extant. In 2007 the building lacked proper roofing; the western part was used as a temporary storage space. In 2008 plans were made for restoring the collapsed walls. The synagogue is now a museum.

The White Synagogue in Joniškis is an Ashkenazi synagogue built in brick between 1864 and 1865. The baroque and neo-classical synagogue has had to be renovated several times since the post-war period, most recently for its transformation into a cultural centre.

The Roman Catholic Cathedral of the Blessed Virgin Mary was built between 1902 and 1906 on a former 17th-century Catholic church. During the French Revolution, the future Louis XVIII lived in Jelgava with a courtyard, which left the church with very luxurious liturgical utensils. Although it briefly bore the title of cathedral between 1783 and 1798, it was not until 1995 that the church was finally erected as a cathedral.