20 abr 1535 ano - While King Gustav Vasa of Sweden is out of the country, an unusual atmospheric phenomenon, the Vädersol, appears in the sky over the Swedish capital of Stockholm, and last for two hours. Because of uncertainty about whether the vädersol is a sign of God showing favor or disapproval of the Protestant reformation and of King Gustav himself, the Evangelical Lutheran Archbishop Olaus Petri commissions Urban Larsson to document the event in a painting, the Vädersolstavlan (Linha do tempo)