The view of the _interior_ of the nave leaves a deep impression. It is mysteriously lighted by magnificent painted windows, and supported on each side by seven large pillars, composed of round agglomerated columns. The two first of these pillars, more gigantic than the rest, support also the towers; the total elevation of the upper arch is more than 31 metres. The interior front, over the principal porch, is adorned with a beautiful sculptured round-window; between this and the grand rose-window is a glass gallery. Above the arches that unite the pillars on both sides of the nave and all along is a fine gothic gallery, serving as a basis to large windows, similar to those of the lower sides of the church. The lower part of the wall of the latter is ornamented with a range of small columns, joined together by og-arches. The magnificent windows of this church represent subjects and personages of Scripture and Legend. Among the artists who have painted these windows, the oldest one known, is master John of Kirchheim; those made after his drawings were put up in 1348; there is no doubt that many of his works still adorn the Cathedral. The names of John Markgraf, James Vischer and the brothers Link were mentioned later. At the latter part of the eighteenth century John Daniel Danegger painted also some, which, however, owing to their mediocrity, have since been removed. For some years past they have undergone considerable repair under the direction of artists of talent and well acquainted with the science of antiquities. The painted windows of the upper galleries of the nave represent the seventy four ancestors of Jesus Christ; higher up are the images of saints and martyrs; in the right aisle, over the vestry, is seen the gigantic figure of saint Christopher: on the South side, of the six windows that have each sixteen divisions, the four first contain some scenes from the history of the Bible; the two last, the day of Judgment and the celestial Jerusalem. On the North side, in an equal number of windows, you see the birth of Jesus Christ, the wise men, and the portraits of several German emperors; the last of these windows represents a series of the oldest events in Scripture. The effect produced by these beautiful windows is greatly increased since they had the happy idea to wash away the daubing with which, about thirty years ago, they had besmeared the inner walls of the Cathedral; by these means the bare part of the wall, a fine stone of a rosy tint, which served for the construction of the church, is rendered visible; it was a measure that bespoke much good taste and knowledge of the christian art.