Gustav Vasa invited the clergyman Olaus Petri (1493–1552) to become the city secretary of Stockholm. With the two side-by-side, the new ideas of the Protestant Reformation could be quickly implemented, and sermons in the church were held in Swedish starting in 1525 and Latin was abolished in 1530. A consequence of this development was a need for separate churches for the numerous German and Finnish-speaking citizens and during the 1530 the still-existent German and Finnish parishes were created. The king was, however, not favourably disposed to older chapels and churches in the city, and he ordered churches and monasteries on the ridges surrounding the city to be demolished, together with the numerous charitable institutions.