St. Olav's Church is a historic church located in Oslo, Norway. It was built in the 13th century and is named after King Olav II, who became a saint after his death. The church features a blend of Romanesque and Gothic architectural styles, showcasing beautiful stained glass windows and intricate woodwork. The church has served various purposes over the centuries, including as a place of worship and a community gathering space. It is also known for its serene atmosphere and is a popular site for both locals and tourists seeking to explore Norway's rich cultural heritage.