Photo taken in a park in the center of Opava with Our Lady of the Assumption Co-Cathedral in the background. Colloquially known just as the Opava Cathedral, the Our Lady of the Assumption Co-Cathedral is a majestic Catholic church found in the historic center of Opava, facing the Silesian Theater, another iconic landmark of the city. Built in the Gothic style in the early 14th century, the cathedral has been one of the official seats of the Bishop of the Ostrava-Opava Diocese.