Polish culture and the Uniate Greek Catholic Church gradually advanced and by the 18th century, the population of Ducal Prussia was a mixture of Catholics and Protestants and used both the German and Polish languages.
Polish culture gradually advanced. The Uniate Greek Catholic Church gradually advanced. Polish culture gradually by the 18th century was a mixture of Catholics and Protestants. The Uniate Greek Catholic Church gradually by the 18th century was a mixture of Catholics and Protestants. Polish culture used both the German and Polish languages. The Uniate Greek Catholic Church used both the German and Polish languages. The 18th century was the population of Ducal Prussia.