Eric the Holy or Erik the Saint was acknowledged king in most provinces of Sweden in 1150, and his family line subsisted for a hundred years. He did much to establish Christianity in Upper Sweden and built or completed at Old Uppsala the first large church to be erected in the country. It is said that all the ancient laws and constitutions of the kingdom were, by his orders, collected into one volume, which came to be known as King Eric’s Law or The Code of Uppland.
The king soon had to take up arms against the heathen Finns. He vanquished them in battle, and at his desire, St. Henry, Bishop of Uppsala, who had accompanied him on the expedition, remained in Finland to evangelize the people.
The king’s zeal for the Catholic Faith was far from pleasing to his nobles, and we are told that they entered into a conspiracy against him with Magnus, the son of the king of Denmark. King Eric was hearing Mass on the day after the feast of the Ascension when news was brought that a Danish army, swollen with Swedish rebels, was marching against him and was close at hand. With unwavering calm he answered, “Let us at least finish the sacrifice; the rest of the feast I shall keep elsewhere”. After Mass was over, he recommended his soul to God, and marched forth in advance of his guards. The conspirators rushed upon him, beat him down from his horse, and beheaded him. His death occurred on May 18 in 1161.
The relics of St. Eric IX of Sweden are preserved in the Cathedral of Uppsala, and the saintly king's effigy appears on the coat of arms of the city of Stockholm.