Old Moster Church

Old Moster Church stands at the intersection of three defining moments in Norwegian history. Around 995 CE, King Olav Tryggvason built one of the first Christian churches in Norway on this site. In 1024, King Olav Haraldsson and Bishop Grimkjell proclaimed the Kristenretten at Mostratinget, establishing Christian law as the law of the land. And in 1814, the church served as an election site for the constitutional assembly that gave Norway its modern democratic identity. All three kings associated with the Christianization of Norway can be linked to Moster, making this site the single most important location in the story of Norwegian Christianity.

According to Snorri Sturluson's Heimskringla, composed around 1230, Olav Tryggvason reached the Norwegian coast and landed first at Moster in Sunnhordland in 995. He brought English priests with him and built one of his first churches on Norwegian soil. Mass was celebrated, and the Christianization of Norway began in earnest. Whether Olav Tryggvason personally oversaw the construction or merely commissioned it remains unclear from the sources, but the association between the king and this site is deeply embedded in Norwegian historical memory.

Three decades later, a second king arrived at Moster. Olav Haraldsson, who would later be canonized as Saint Olav and become Norway's patron saint, convened the national law assembly known as Mostratinget in 1024. Together with Bishop Grimkjell, an English-born churchman, he introduced the Kristenretten, the first Christian laws of Norway. These laws did not merely establish Christianity as the official religion. They created a framework for individual rights and legal protections, regulated baptism, marriage, and burial, and formally replaced the pagan customs that had governed Norwegian society. Later generations described this transformation as the transition from a society of power to a society of law.

The date of the Mostratinget assembly has been subject to minor scholarly debate. Most sources, including the official Moster 2024 jubilee and the Church of Norway, identify 1024 as the year. At least one source suggests 1022. The weight of evidence and institutional consensus supports 1024.