The steeple was built within the 13th century, but changed over the time. Renovating it end of the 19th century, it got the look, it has today, though the top part (the little green roofs and everyting above) is from the mid 1950s, as it was bombed during WWII. The greyish building on the left is the museum of the diocese, which shows the "Dom-Schatz" - the treasure.