original_query: What is the significance of St. Mary's Church, St. Nicholas Church, and St. James Church in Stralsund?
query: What is the significance of St. Mary's Church, St. Nicholas Church, and St. James Church in Stralsund?
answer: These three large medieval Brick Gothic churches highlight Stralsund's medieval importance.  St. Mary's was once the world's tallest structure. St. James' is now a cultural venue.  St. Nicholas' is located on the Alter Markt Square.