Part of the Swedish-language caption for this at mynewsdesk.com/se/livrustkammaren/images/kung-kristina-drottning-av-sverige-180776 translates, using Google, to, “...Here depicted at the time of coronation in the cloak jacket and with all the regalia; crown, sprout, apple, sword and key…”
From Google search.
Christina poses in mid-century dress with puffed sleeves and a close skirt and fitted bodice separated by a vee waistline.
Keywords: Beck - David, 1650, Queen Christina, Queen Christine, Drottning Kristina, Kristina Alexandra, drottning av Sverige, Vasa family, Queen, proto-hurluberlu coiffure, headdress, chemise, modesty piece, vee neckline, elbow length full under-sleeves, arm bands, flared cuffs, bracelets, fitted bodice, elbow length puffed over-sleeves, vee waistline, shoes, robes, regalia