Our river cruise ship was docked across the river from this museum and we had an extra day to explore more of Passau. We decided to walk across the bridge and climb the stairs and walkways to the top. This worked fine and was not as strenuous as some had intimated. You can also take a van from the Rathaus to the museum. We were rewarded with a wonderful historical museum and views. We spent at least 2 hours in the museum and still didn't have the energy to see everything. Most items are only labelled in German, but the historical background of the exhibits were also in English. We later had lunch in the restaurant overlooking the city which was a pleasant way to spend time before our walk back down.