He gave financial support to Stanisław Konarski's initiatives such as the Collegium Nobilium. He maintained close contacts with men of learning such as Jan Daniel Janocki. He passed on to Gottfried Lengnich for printing a 1426 manuscript of Kadłubek's Chronicles that he had found, and the "Heilsberg manuscript" of Gallus Anonymus. It was thanks to Grabowski that Johann Friedrich Endersch'sRoyal Mathematician to King August III of Poland. map of the diocese (the Map of Holy Warmia) was published. He himself took an interest in the history of art and gathered extensive collections of books, statues, paintings and porcelain.
