The former queen's tomb is now being opened for the first time in over 150 years.
"The investigation can be compared to a medical doctor's visit," researcher Ulla Nordfors said, according to Swedish Yle.
The opening of the grave is taking place in connection with the renovation of the cathedral - and with the aim of an exhibition in Tampere in 2028, 460 years after Månsdotter's coronation in 1568.
The research is being conducted jointly by experts from the Vapriikki Museum in Tampere and the University of Turku. Using modern methods, the researchers hope to learn more about the health, appearance and origins of the famously beautiful queen.
Tampere is located near Liuksiala Royal Estate, where Karin Månsdotter, or Queen Katarina as she styled herself after the coronation, died in 1612. She is the only Swedish royal buried in Finland.
