 Some of them were built near the borders with the Protestant Duchy of Prussia and Duchy of Livonia.When Giedraitis died, the diocese had 50 parishes.According to Motiejus Valančius, Giedraitis established three deaneries (in Virbalis, Viduklė, and Luokė) in 1587, but documents mentioning deaneries in the diocese date only from 1619–1620.