In 1648 she commissioned 35 paintings from Jacob Jordaens for a ceiling in Uppsala Castle. In 1649, 760 paintings, 170 marble and 100 bronze statues, 33,000 coins and medallions, 600 pieces of crystal, 300 scientific instruments, manuscripts and books (including the by Rabanus Maurus, the and the ) were transported to Stockholm. The art, from Prague Castle, had belonged to Rudolf II, Holy Roman Emperor and was captured by Hans Christoff von Königsmarck during the Battle of Prague and the negotiations of the Peace of Westphalia. By 1649–1650, "her desire to collect men of learning round her, as well as books and rare manuscripts, became almost a mania," Goldsmith wrote. To catalogue her new collection she asked Isaac Vossius to come to Sweden and Heinsius to purchase more books on the market.