Olof Persson, sometimes Petersson (6 January 1493 – 19 April 1552), better known under the Latin form of his name, Olaus Petri (or less commonly, Olavus Petri), was a clergyman, writer, judge, and major contributor to the Protestant Reformation in Sweden.

Olaus Petri was a Lutheran churchman who, with his brother Laurentius, played a decisive role in the reformation of the Swedish church. He studied at Wittenberg (1516–18) and absorbed the reformed teaching of Martin Luther and Philipp Melanchthon.

May 31, 2017 · Olaus Petri (1493 – 1552), the brother of Laurentius also played an important role in the Reformation in Sweden. He studied for the Roman Catholic priesthood at the University in Wittenberg – and this put him in contact with Luther and Melanchthon.

Olaus Petri was a gifted theologian, a great popular preacher, and an able writer. He was not a fighter like luther, but more a man of peace and seriousness. He had a genius for absorbing materials from Luther or other reformers (for example, the Ratschlag of Osiander of 1524) and reworking them into literature adapted to his countrymen.

At one of the disputations, in the presence of the king and leading men of Sweden, Olaf Petri with great ability, courageously preached the doctrines of the reformed faith against the Romish champions.

Olaus Petri (shown here) and his brother Laurentius were leading reformers of Sweden. WHEN OLOF PERSSON WAS BORN on this day, 6 January 1493, there were no Protestants in Sweden. The country was Roman Catholic.

PETRI, pā′trē̇ Olaus (1493-1552). A Swedish reformer, born at Orebro, in the Province of Nerike. He studied at Upsala and the University of Leipzig, and afterwards at Wittenberg, where he continued his theological studies under Luther and Melanchthon.

Olaus Petri wrote polemical texts against the Mass, celibacy, the cult of the saints and monastic life, and he published a Mass and a liturgy in Swedish. In Petri's writings from the 1520s, Martin Luther is identified as the theological authority on which the Swedish Reformation is based.

Olavus and Laurentius Petri were two brothers who led the Reformation in Sweden in the sixteenth century. Olavus, the elder brother, was born in 1493, Laurentius in 1499, both in Örebro, the chief town of Nerike (modern Närke), from which Laurentius is sometimes called Nericius.

Olavus Petri (born 1493) and his brother Laurentius (born 1499) were the principal leaders of the Lutheran movement in Sweden. Both studied at Wittenberg, where they were influenced by Martin Luther.