St Olav's Church at Avaldsnes is a must-see for any tourist visiting Norway. Located on the island of Karmøy, this ancient church is believed to have been built in the 12th century, making it one of the oldest churches in Norway. It is believed to have been the site of the coronation of King Olav Haraldsson in the year 1023. The church is a beautiful example of Romanesque architecture, with its thick walls and round arches. Inside, you can find a number of interesting artifacts, including a 12th-century baptismal font and a 15th-century altarpiece. The church is also home to a number of important historical documents, including the oldest known Norwegian charter. St Olav's Church at Avaldsnes is a must-see for anyone interested in Norway's history and culture.