Hólar Cathedral is the oldest church built of stone in Iceland and was consecrated in 1763. It was built with red tuff stones from the Hólabyrða mountain and was recently renovated in what is believed to be the original interior. It is truly one of the most important historical treasures in Iceland and within it there are artefacts dating from the catholic era in Iceland. That era ended in 1550 when the last catholic bishop in Iceland was decapitated in Skálholt with his two sons. In 1950 a bell tower was built next to the church in his memory.