Simplify the following text for a Grade 12 native English-speaking person.
Original: Calvinism gained some popularity in Scandinavia , especially Sweden , but was rejected in favor of Lutheranism after the synod of Uppsala in 1593 .
Simplified: Calvinism was popular as well for some time in Scandinavia , especially Sweden , but was rejected in favor of Lutheranism after the synod of Uppsala in 1593 .