Cathedral Hill (Wzgórze Katedralne) is the collective name for Frombork’s famed development complex composed of a medieval cathedral, bishopric palaces, diocesan chanceries, defensive walls, towers and keeps. Dating from at least the 14th century, this was where Copernicus was believed to have worked, and is therefore something of a shrine for Copernicus fanatics the world over. Remarkably, Cathedral Hill was practically the only part of Frombork left standing at the end of the Second World War.
With no explanations in English you might wish to consider using a tour guide. Local expert Stanisław Kuprjaniuk is the very man for the job. Call him in advance one day before you want to visit on tel. 609 68 33 13.