a "simple" Carthusian monastery (twelve cells) but less than the Grande Chartreuse (thirty-five cells) or Aula Dei, near Saragossa (thirty-six). The cells were numbered by the first nineteen letters of the alphabet, from A to T, in a clockwise rotation, starting from the west. The first eight cells, numbered A to H, were built by the master builder Ulrich Tretsch; the first seven were financed by donations from Leopold V of Austria-Tyrol, the eighth by Tretsch himself. The construction dates of the other cells are unknown, with the exception of the O and P cells, which were built in 1670. As in all the Carthusian monasteries, cells A and B are traditionally reserved for the prior and the vicar; in addition, in Molsheim, cell E was that of the sub-sacristan. The cells are marked on the map and are indicated in black capital letters above each cell door. In 2017, the letters D, E, F, M, P and T visible above the doors are the original ones. Some cells, such as E, have just a lettering. Others, M and P for example, show two successive states of lettering. The doorposts to the cells are sometimes decorated with plant motifs, as in the case of doors D and E. The two doors of cells E and G have also retained their old cold-hammered fittings. Each door is also juxtaposed with a pass-through, known as a "guichet", which allows the Carthusian father to receive his food without human contact. The doorposts to the cells are sometimes decorated with plant patterns, as in the case of doors D and E. The two doors of cells E and G have also retained their old cold-hammered fittings. Each door is also juxtaposed with a pass-through, known as a " counter ", which allows the Carthusian father to receive his food without human contact. Each cell consisted of a single-storey house. This small house, leaning against the wall separating it from the neighbouring cell, was covered with a hipped roof perpendicular to the church, with the exception of cell A which was on the east-west axis. The houses at the eastern end of the cloister were grouped in pairs under the same roof: H with L, I with K, M with P and N with O. Each little house had a small garden which the monk cultivated; along it was built a promenoir, a gallery running