 During Giedraitis' tenure, the Diocese of Vilnius was vacated twice – in 1579 after the death of Walerian Protasewicz and in 1591 after the reassignment of Jerzy Radziwiłł to the Diocese of Kraków – but due to unknown reasons, Giedraitis did not pursue the post.After Radziwiłł's reassignment in 1591, the King wanted to move Bernard Maciejowski, Bishop of Lutsk, to Vilnius.However, Grand Chancellor Lew Sapieha refused to confirm the appointment leading to a power struggle that lasted almost a decade.