Bo Jonsson was head of the royal council and marshal under the regency of Magnus IV of Sweden. Also in the council was his friend and colleague, Karl Ulfsson av Ulvåsa, eldest son of Saint Birgitta. F
Gripsholm Castle was originally built as Bo Jonsson's seat. It was extended into a royal renaissance palace during the reign of King Gustav I.
Mariefred is a locality situated in Strängnäs Municipality, Södermanland County, Sweden with 7,121 inhabitants in 2023.
Mariefred in August 2005 as seen from Gripsholm Castle