The Arnau Church of St. Catherine of Alexandria is a Brick Gothic church 8km east of Kaliningrad near the Pregolya River and the Russian-Lithuanian border. It was built in the 14th century as a Catholic church in the East Prussian village of Arnau (modern Rodniki) and until recently contained more than 200 medieval frescoes from the 14th century. It became a Lutheran church after the Reformation and the frescoes were whitewashed, then uncovered in the early 20th century. After 1945, when the Kaliningrad region became part of the Soviet Union, the church was used for grain storage. In 2003 a restoration campaign was launched. with the church building then belonging to the Kaliningrad History Museum, which used it for exhibitions and orthodox liturgy.